Adjectives That Start With M
An adjective is a word that describes or modifies a noun or pronoun, providing more information about its characteristics.
Below, you'll find a comprehensive list of adjectives starting with the letter M, sorted alphabetically:
650 Adjectives That Start With M
- Macabre: involving death or violence in a way that is strange, frightening, or unpleasant.
- Macadamized: surfaced with small broken stones bound with tar or asphalt.
- Macaronic: composed of a mixture of languages.
- Maccabean: relating to the Maccabees or their period.
- Machiavellian: cunning, scheming, and unscrupulous, especially in politics.
- Macho: having or characterized by qualities considered manly, especially when manifested in an assertive or aggressive manner.
- Macro: large in scale or scope.
- Macroscopic: visible to the naked eye.
- Mad: mentally ill; insane.
- Maddening: extremely annoying or displeasing.
- Maddish: somewhat mad or crazy.
- Made-up: fabricated or invented; not real.
- Mafioso: a member of the Mafia.
- Magenta: a purplish-red color.
- Maggoty: infested with maggots.
- Magic: having supernatural powers.
- Magical: relating to, using, or resembling magic.
- Magisterial: having or showing great authority.
- Magistral: authoritative; magisterial.
- Magnanimous: generous or forgiving, especially toward a rival or less powerful person.
- Magnate: a wealthy and influential person, especially in business.
- Magnetic: having the properties of a magnet; capable of being attracted by or acquiring the properties of a magnet.
- Magnetized: made magnetic.
- Magnificent: impressively beautiful, elaborate, or extravagant.
- Magnoid: resembling or pertaining to magnets.
- Mahometan: relating to Muhammad or Islam.
- Maiden: a girl or young woman, especially an unmarried one.
- Maidenly: characteristic of a maiden; modest and innocent.
- Mainstream: belonging to or characteristic of the ideas, attitudes, or activities that are regarded as normal or conventional.
- Majestic: having or showing impressive beauty or dignity.
- Major: important, serious, or significant.
- Malachite-green: a bright green color.
- Maladaptive: not providing adequate or appropriate adjustment to the environment or situation.
- Maladjusted: failing or unable to cope with the demands of a normal social environment.
- Maladroit: ineffective or bungling; clumsy.
- Malady: a disease or ailment.
- Malapert: boldly disrespectful; impudent.
- Malaprop: a humorous misuse of a word.
- Malapropos: inappropriate or ill-timed.
- Malayan: relating to the Malay Peninsula or its people.
- Malayic: relating to the Malay language or its family.
- Malaysian: relating to Malaysia or its people.
- Malcontent: a person who is dissatisfied and rebellious.
- Male: of or denoting the sex that produces small, typically motile gametes.
- Maledict: cursed or spoken ill of.
- Maledictory: involving or uttering curses.
- Malefic: causing harm or destruction.
- Malevolent: having or showing a wish to do evil to others.
- Malfeasant: engaging in wrongdoing or misconduct, especially by a public official.
- Malformed: abnormally formed; misshapen.
- Malfunctioning: failing to function properly.
- Malicious: characterized by malice; intending or intended to do harm.
- Malignant: very virulent or infectious.
- Malleable: capable of being shaped or bent.
- Malodorous: smelling very unpleasant.
- Malpighiaceous: pertaining to Malpighiaceae, a family of plants.
- Maltese: relating to Malta or its people.
- Malthusian: relating to Malthus or his theory that population tends to increase faster than the supply of subsistence.
- Maltreated: treated badly or cruelly.
- Mammalian: relating to mammals.
- Mammiferous: bearing mammary glands.
- Mammoth: huge; gigantic.
- Manageable: able to be controlled or dealt with without difficulty.
- Managerial: relating to management or managers.
- Mandated: given official authority to act.
- Mandibular: relating to the lower jaw.
- Maneuverable: capable of being steered or directed easily.
- Manful: having or showing courage and resolution.
- Manganese: relating to the chemical element manganese.
- Mangled: severely mutilated, disfigured, or damaged.
- Manic: showing wild and apparently deranged excitement and energy.
- Manipulable: capable of being manipulated.
- Manipulative: characterized by unscrupulous control of a situation or person.
- Manitoban: relating to Manitoba, Canada.
- Manned: having a human crew.
- Mannered: behaving in a specified way.
- Mannerism: a habitual gesture or way of speaking or behaving.
- Mannerly: polite; courteous.
- Manning: providing with a workforce.
- Mannish: resembling or characteristic of a man.
- Manoeuvrable: capable of being maneuvered easily.
- Manorial: relating to a manor.
- Mansard: a roof having two slopes on all sides with the lower slope steeper than the upper.
- Mantic: relating to divination or prophecy.
- Manticore: a mythical animal typically depicted as having the head of a man, the body of a lion, and the tail of a dragon or scorpion.
- Manual: done with the hands.
- Manuscript: a document written by hand or typewritten.
- Manx: relating to the Isle of Man or its people.
- Many-faced: having many aspects or sides.
- Many-sided: having many different aspects or sides.
- Map-like: resembling a map.
- Marantaceous: relating to the Marantaceae family of plants.
- Marbled: having streaks of color like marble.
- Marcescent: withering but not falling off.
- Marching: moving in a regular, measured way.
- Marconigraphic: relating to Marconi's telegraphy.
- Marginal: relating to or situated at the edge or margin.
- Maricultural: relating to the cultivation of marine organisms.
- Marinated: soaked in a seasoned liquid.
- Marital-status: relating to whether someone is married or single.
- Maritime-law: relating to laws governing navigation and shipping.
- Marked: having a visible mark or marks.
- Marker: something that serves to identify, predict, or characterize.
- Marketable: able or fit to be sold or marketed.
- Markovian: relating to a Markov process or Markov chain.
- Marmoset: a small Central and South American monkey with a silky coat and a long tail.
- Marooned: left trapped and alone in an inaccessible place.
- Marriageable: suitable for marriage.
- Married: united in marriage.
- Martial: relating to fighting or war.
- Martian: relating to the planet Mars or its supposed inhabitants.
- Martine: relating to the sea.
- Martinet: a strict disciplinarian.
- Marvellous: causing great wonder; extraordinary.
- Marvelous: causing great wonder; extraordinary.
- Marzipan: a sweet yellowish paste of ground almonds, sugar, and egg whites.
- Mascagnite: a naturally occurring ammonium sulfate.
- Masculine: having qualities traditionally associated with men.
- Masked: having a mask; disguised.
- Masqueraded: pretended to be someone one is not.
- Mass: relating to a large number of people or things.
- Massacre: the brutal killing of many people.
- Massed: gathered together in a large group.
- Masseteric: relating to the masseter muscle in the jaw.
- Massive: large and heavy or solid.
- Massless: having no mass.
- Masted: having a mast or masts.
- Masterful: performed or performing very skillfully.
- Masterly: having or showing great skill or proficiency.
- Masticatory: related to chewing.
- Mastoid: relating to the mastoid process of the temporal bone.
- Match-fit: in a condition suitable for competing in a sports match.
- Matchless: having no equal; incomparable.
- Mateless: having no mate.
- Materfamilias: the female head of a family or household.
- Material: relating to physical objects rather than the mind or spirit.
- Maternal: relating to a mother, especially during pregnancy or shortly after childbirth.
- Maternity: the period during pregnancy and shortly after childbirth.
- Matey: friendly; sociable.
- Mathematical: relating to mathematics.
- Matinee: a performance in a theater or a showing of a movie that takes place in the daytime.
- Mating: the act of pairing for reproduction.
- Matless: without a mat.
- Matronly: characteristic of an older married woman.
- Matsutake: a type of mushroom.
- Matted-hair: hair that is tangled into a thick mass.
- Matter: physical substance.
- Mattressed: provided with a mattress.
- Mature: fully developed physically; full-grown.
- Maudlin: overly sentimental.
- Mauled: wounded by scratching or tearing.
- Maundy: relating to the ceremony of washing the feet of the poor.
- Mauritian: relating to Mauritius or its people.
- Maurya: relating to the Mauryan dynasty of ancient India.
- Maverick: an unorthodox or independent-minded person.
- Mawkish: excessively sentimental.
- Maxillary: relating to the jaw or jawbone.
- Maximal: of or constituting a maximum; the highest or greatest possible.
- Maximalist: a person who holds extreme views and is not willing to compromise.
- Maximum: the greatest or highest amount possible or attained.
- Mayoral: relating to a mayor.
- Mazdean: relating to Zoroastrianism.
- Mazed: bewildered or perplexed.
- Mazic: related to a maze or labyrinth.
- Mazurian: relating to the Mazury region of Poland.
- Mazy: full of confusing turns, passages, etc.; labyrinthine.
- Meager: lacking in quantity or quality.
- Meagerness: the quality of being meager.
- Meagre: lacking in quantity or quality.
- Mealy: having the texture or look of meal; powdery.
- Mealymouthed: unwilling to speak plainly or the truth.
- Mean: unkind, spiteful, or unfair.
- Meaningful: having meaning or significance.
- Meant: intended to do something.
- Measly: contemptibly small or few.
- Measurable: able to be measured.
- Measured: having a slow, regular rhythm.
- Meat-like: resembling meat in texture or flavor.
- Meatless: not containing meat.
- Meaty: containing or resembling meat.
- Mechanic: relating to or involving machinery or tools.
- Mechanical: operated by a machine or machinery.
- Mechanized: equipped with machinery.
- Meddlesome: fond of meddling; interfering.
- Median: situated in the middle.
- Mediating: acting through an intervening agency.
- Mediatorial: acting as a mediator.
- Medicable: capable of being treated by medicine.
- Medical: relating to the science of medicine.
- Medicinal: having healing properties.
- Medient: lying or occurring in the middle.
- Medieval: relating to the Middle Ages.
- Mediocre: of only moderate quality; not very good.
- Meditabund: inclined to meditation.
- Meditative: of, involving, or absorbed in meditation or considered thought.
- Medium: about halfway between two extremes of size or another quality; average.
- Medullary: relating to the medulla of any bodily organ or structure.
- Megascopic: visible to the naked eye.
- Megathermal: relating to a climate with high temperatures.
- Meiny: a group of attendants or followers.
- Melancholic: feeling or expressing pensive sadness.
- Melancholy: a feeling of pensive sadness, typically with no obvious cause.
- Melanesian: relating to Melanesia or its people.
- Melanism: an increased amount of black or nearly black pigmentation.
- Melanitic: relating to melanism.
- Melanotic: affected with or relating to melanosis.
- Melastomaceous: relating to the Melastomataceae family of plants.
- Melic: relating to verse or poetry intended to be sung.
- Melliferous: producing or bearing honey.
- Mellow: pleasantly smooth or soft; free from harshness.
- Melodic: of, having, or producing melody.
- Melodious: having a pleasant melody.
- Melodized: set to a melody.
- Melodramatic: characteristic of melodrama, especially in being exaggerated or overemotional.
- Meltable: capable of being melted.
- Melting: becoming liquefied by heat.
- Member: belonging to a particular group.
- Memorable: worth remembering or easily remembered.
- Memorial: something, especially a structure, established to remind people of a person or event.
- Memorialized: preserved the memory of.
- Memorized: committed to memory.
- Menacing: suggesting the presence of danger; threatening.
- Mendacious: not telling the truth; lying.
- Menial: relating to work not requiring much skill and lacking prestige.
- Mental: relating to the mind.
- Mentholated: containing or treated with menthol.
- Mentionable: able to be mentioned.
- Mercantile: relating to trade or commerce.
- Mercenary: primarily concerned with making money at the expense of ethics.
- Merciful: showing or exercising mercy.
- Merciless: showing no mercy.
- Mercurial: subject to sudden or unpredictable changes of mood or mind.
- Meridian: relating to a meridian.
- Meroblastic: undergoing partial cleavage.
- Meromorphic: having a finite number of poles in the complex plane.
- Merozoitic: relating to a merozoite.
- Merry: cheerful and lively.
- Merse: a stretch of marshy ground.
- Mersian: relating to the kingdom of Mercia.
- Mesmerizing: capturing one's complete attention.
- Mesoamerican: relating to the region extending from central Mexico to Honduras and Nicaragua.
- Mesoblastic: relating to the mesoblast.
- Mesocratic: of intermediate composition between acidic and basic.
- Mesolithic: relating to the middle part of the Stone Age.
- Mesopotamian: relating to ancient Mesopotamia.
- Mesozoic: relating to the era between the Paleozoic and Cenozoic eras.
- Messianic: relating to the Messiah.
- Messy: untidy or dirty.
- Metachromatic: capable of changing color.
- Metacyclic: relating to a change in the life cycle.
- Metagalactic: relating to the metagalaxy.
- Metagrobolized: perplexed or confounded.
- Metal-rich: containing a large amount of metal.
- Metalizing: coating with a thin layer of metal.
- Metallic: relating to or resembling metal.
- Metallographic: relating to the study of the structure of metals.
- Metalloid: having properties of both metals and non-metals.
- Metameric: having or consisting of segments.
- Metaphase: the stage of cell division in which chromosomes align in the middle of the cell.
- Metaphoric: using or of the nature of a metaphor.
- Metaphyseal: relating to the metaphysis of a bone.
- Metaphysical: relating to metaphysics.
- Metapodial: relating to the metapodial bones.
- Metapsychic: beyond or above the physical.
- Metastable: stable but susceptible to change.
- Metatarsal: relating to the metatarsus of the foot.
- Metathoracic: relating to the metathorax.
- Metazoic: relating to the Metazoa.
- Meteor-like: resembling a meteor.
- Meteoric: relating to meteors.
- Meteoritic: relating to meteorites.
- Meteorological: relating to the science of meteorology.
- Methanolic: relating to methanol.
- Methodical: done according to a systematic or established form of procedure.
- Methodized: arranged methodically.
- Methodological: relating to the system of methods used in a particular area of study or activity.
- Meticulous: showing great attention to detail.
- Metonymic: relating to metonymy.
- Metre: the fundamental unit of length in the metric system.
- Metric: relating to or based on the meter.
- Metro: relating to a metropolitan area.
- Metronomic: relating to or resembling a metronome.
- Metropolar: relating to both metropolitan and polar regions.
- Metropolitan: relating to a metropolis.
- Metrostylic: relating to the metro style.
- Mettlesome: full of spirit and courage.
- Mexicali: relating to Mexicali, Mexico.
- Mexican: relating to Mexico or its people.
- Miasmic: relating to miasma.
- Micro: extremely small.
- Microbial: relating to microorganisms.
- Microchemistry: chemistry dealing with very small quantities of material.
- Micrococcal: relating to the Micrococcaceae family of bacteria.
- Microcrystalline: consisting of small crystals.
- Microcytic: relating to or characterized by small red blood cells.
- Microeconomic: relating to the part of economics concerned with single factors and the effects of individual decisions.
- Microelectronic: relating to the design and manufacture of extremely small electronic devices.
- Microgroove: having very fine grooves.
- Micrological: relating to micrology.
- Micrometric: relating to measurement with a micrometer.
- Micropaleontological: relating to the study of microscopic fossils.
- Microphagous: feeding on very small particles.
- Microphthalmic: having abnormally small eyes.
- Microphysical: relating to microphysics.
- Microplanktonic: relating to microscopic plankton.
- Microprismatic: relating to microscopic prisms.
- Micropterous: having small wings.
- Microscopic: so small as to be visible only with a microscope.
- Microsomal: relating to microsomes.
- Microsporidian: relating to Microsporidia.
- Microstatic: relating to small-scale phenomena.
- Microwavable: suitable for use in a microwave oven.
- Microweber: relating to very small units of magnetic flux.
- Mid: in the middle of.
- Middle: at an equal distance from the extremities of something.
- Middle-aged: being of the age intermediate between youth and old age.
- Middle-class: relating to the social group between the upper and working classes.
- Mideastern: relating to the Middle East.
- Midfield: the central part of a sports field.
- Midwestern: relating to the Midwest of the United States.
- Mighty: possessing great and impressive power or strength.
- Mild: not severe, serious, or harsh.
- Militant: combative and aggressive in support of a political or social cause.
- Military: relating to or characteristic of soldiers or armed forces.
- Milky: resembling milk in color or consistency.
- Millenarian: relating to a belief in a future thousand-year age of blessedness.
- Millenary: of or relating to a thousand, especially a thousand years.
- Milling: moving around in a confused mass.
- Millionaire: a person whose assets are worth one million dollars or more.
- Milquetoast: a timid or feeble person.
- Mimetic: relating to, constituting, or habitually practicing mimesis.
- Mimsy: rather feeble and prim or affected.
- Mind-altering: having a strong influence on one's mental state.
- Mind-bending: intellectually or emotionally overwhelming.
- Mind-blowing: overwhelmingly impressive.
- Mind-expanding: having a strong influence on one's mental state.
- Mind-numbing: so extreme or intense as to prevent normal thought.
- Mindful: conscious or aware of something.
- Mindless: acting or done without justification or concern for the consequences.
- Mineral-rich: containing a large amount of minerals.
- Mini: very small; miniature.
- Miniature: much smaller than normal.
- Minimal: of a minimum amount, quantity, or degree.
- Minimalist: characterized by the use of only the simplest or most essential elements.
- Minimized: reduced to the smallest possible amount or degree.
- Minimum: the least or smallest amount or quantity possible.
- Miniscule: extremely small; tiny.
- Ministerial: relating to a minister of religion or government.
- Miniver: a kind of white fur used for lining and trimming clothes.
- Minor-key: relating to a key in music based on a minor scale.
- Minority: the smaller number or part.
- Mint: in perfect condition.
- Mint-fresh: newly made or obtained.
- Minute: extremely small.
- Miraculous: occurring through divine or supernatural intervention.
- Mirific: causing wonder or amazement.
- Mirthful: full of mirth; merry.
- Miry: very muddy or boggy.
- Misadventurous: characterized by misadventure.
- Misaligned: having an incorrect position or alignment.
- Misallied: wrongly or unsuitably allied.
- Misanthropic: disliking humankind and avoiding human society.
- Misanthropist: a person who dislikes humankind.
- Misbegotten: badly conceived, designed, or planned.
- Misborn: born under unfavorable conditions.
- Misbranded: labeled incorrectly or misleadingly.
- Miscellaneous: consisting of various kinds or types.
- Mischievous: causing or showing a fondness for causing trouble in a playful way.
- Misconducted: behaved in an improper manner.
- Miscreant: a person who behaves badly or in a way that breaks the law.
- Misdiagnosed: diagnosed incorrectly.
- Miserable: wretchedly unhappy or uncomfortable.
- Miserly: of or characteristic of a miser.
- Misfit: a person whose behavior or attitude sets them apart from others.
- Misguided: having or showing faulty judgment or reasoning.
- Mishandled: managed or dealt with wrongly or ineffectively.
- Misled: caused someone to have a wrong idea or impression.
- Mismatched: not matching; unsuitable for pairing or combining.
- Misogamic: hating marriage.
- Misogynistic: strongly prejudiced against women.
- Misomaniacal: having an obsessive hatred.
- Misoriented: having an incorrect or inappropriate orientation.
- Misquoted: quoted incorrectly.
- Misrepresented: given a false or misleading representation of.
- Missing-link: something that is needed to complete a series or provide continuity.
- Missive: a written communication.
- Mist-bound: enveloped in mist.
- Mist-clad: covered with mist.
- Mist-filled: filled with mist.
- Mist-laden: heavily laden with mist.
- Mist-wreathed: surrounded or adorned with mist.
- Mistakable: capable of being misunderstood or misinterpreted.
- Mistaken: wrong in one's opinion or judgment.
- Mistrusted: regarded with suspicion.
- Mistrustful: having or showing a lack of trust.
- Misty: full of, covered with, or accompanied by mist.
- Misty-eyed: having tears in one's eyes, especially through emotion.
- Misunderstood: incorrectly interpreted or understood.
- Misused: used in the wrong way or for the wrong purpose.
- Mitigating: making less severe, serious, or painful.
- Mitogenic: capable of inducing mitosis.
- Mitral: relating to the mitral valve of the heart.
- Mitred: having a miter joint or miters.
- Mittens: gloves that cover the hand but have a separate section for the thumb.
- Mittyesque: resembling or characteristic of Walter Mitty.
- Mix-up: a confused state of affairs.
- Mixed: consisting of different qualities or elements.
- Mixed-emotion: having mixed feelings or emotions.
- Mixolydian: relating to one of the ancient Greek musical modes.
- Mixt: mixed.
- Mizzen: the mast aft of a ship's mainmast.
- Mnemonic: aiding or designed to aid the memory.
- Moanful: full of moaning.
- Moaning: making low, sustained, mournful sounds.
- Moated: surrounded by a moat.
- Mobile: able to move or be moved freely or easily.
- Mock: not authentic or real, but without the intention to deceive.
- Modern: relating to the present or recent times as opposed to the remote past.
- Modernistic: relating to modernism in art, architecture, etc.
- Modest: unassuming or moderate in the estimation of one's abilities or achievements.
- Modified: changed in form or character.
- Modish: conforming to or following what is currently popular and fashionable.
- Modular: composed of standardized units or sections for easy construction or flexible arrangement.
- Moist: slightly wet; damp or humid.
- Molal: relating to a solution containing one mole of solute per kilogram of solvent.
- Moldable: capable of being shaped or formed.
- Molecular: relating to or consisting of molecules.
- Molested: assaulted or abused.
- Molinary: relating to a mill or milling.
- Mollusk-like: resembling a mollusk.
- Molten: liquefied by heat.
- Momentary: lasting for a very short time.
- Momentous: of great importance or significance.
- Monarchical: relating to a monarch or monarchy.
- Monastic: relating to monks, nuns, or others living under religious vows.
- Monegasque: relating to Monaco or its people.
- Monetary: relating to money or currency.
- Moneyed: having much money; wealthy.
- Mongering: promoting or spreading.
- Mongolic: relating to the Mongolian language or people.
- Monied: having a lot of money.
- Moniker: a name or nickname.
- Moniliform: having the form of a string of beads.
- Monist: relating to monism, the doctrine that only one supreme being exists.
- Monistic: relating to monism.
- Monition: a warning or intimation of something imminent.
- Monkfish: a type of fish.
- Monochromatic: containing or using only one color.
- Monocultural: relating to a single culture.
- Monodactylous: having only one finger or toe.
- Monodramatic: relating to a drama performed by a single actor.
- Monogamous: involving marriage to one person at a time.
- Monoglot: speaking only one language.
- Monographic: relating to a monograph.
- Monolingual: speaking or using only one language.
- Monolithic: large, powerful, and intractably indivisible and uniform.
- Monomaniacal: obsessed with one idea or subject.
- Monometallic: consisting of one metal.
- Monomolecular: consisting of single molecules.
- Monomorphemic: consisting of a single morpheme.
- Monomorphic: having a single form.
- Mononuclear: having a single nucleus.
- Mononymous: known by only one name.
- Monophthongal: relating to a pure vowel sound.
- Monoplastic: consisting of one part or tissue.
- Monopodial: having a single main stem.
- Monopolistic: relating to or having the characteristics of a monopoly.
- Monoprotic: capable of donating one proton per molecule in an acid-base reaction.
- Monostable: having a single stable state.
- Monostichous: arranged in a single row.
- Monosyllabic: consisting of one syllable.
- Monotone: a continuing sound, especially of someone's voice, that is unchanging in pitch and without intonation.
- Monotonous: dull, tedious, and repetitious; lacking in variety and interest.
- Monotrematic: relating to monotremes.
- Monotrichous: having a single flagellum.
- Monotypic: representing only one type or group.
- Montenegrin: relating to Montenegro or its people.
- Montessorian: relating to the Montessori method of education.
- Monthly: occurring once a month.
- Monumental: great in importance, extent, or size.
- Mooing: making the characteristic deep sound of a cow.
- Moon-faced: having a round, broad face.
- Moon-struck: mentally deranged, supposedly by the influence of the moon.
- Moonlike: resembling the moon.
- Moonlit: illuminated by the moon.
- Moonshine: illicitly distilled or smuggled liquor.
- Moorish: relating to the Moors.
- Moorland: an extensive area of moor.
- Moot: subject to debate, dispute, or uncertainty.
- Moped: gloomy and in low spirits.
- Mopey: given to moping; sulky.
- Moral: concerned with the principles of right and wrong behavior.
- Moralistic: overfond of making moral judgments about others' behavior.
- Moralizing: commenting on issues of right and wrong, typically with an unfounded air of superiority.
- Moran: relating to the Morans, a clan of the Maasai people.
- Moravian: relating to Moravia or its people.
- Morbid: characterized by an abnormal and unhealthy interest in disturbing and unpleasant subjects.
- Mordant: having or showing a sharp or critical quality.
- More-than: greater in number or degree than.
- Morning-glory: a climbing plant with trumpet-shaped flowers.
- Mornish: resembling the morning.
- Morphallactic: relating to the ability to regenerate the whole organism from a part.
- Morphogenetic: relating to the development of the form of an organism or part.
- Morphologic: relating to the form or structure of things.
- Morriconian: relating to Ennio Morricone, an Italian composer.
- Mortal: subject to death.
- Mortified: feeling embarrassed, ashamed, or humiliated.
- Mortuary: relating to burial or tombs.
- Mosaic: relating to or resembling a mosaic.
- Mosby: relating to Mosby, a Confederate guerrilla leader.
- Mosquito-infested: heavily populated by mosquitoes.
- Moth-eaten: damaged or destroyed by moths.
- Moth-fluttered: having fluttered like a moth.
- Motherlike: resembling a mother.
- Mothproof: resistant to damage by moths.
- Motile: capable of movement.
- Motionless: not moving; stationary.
- Motivated: provided with a motive or given incentive.
- Motivational: providing reasons to act in a certain way.
- Motivative: serving to motivate.
- Motor-car: an automobile.
- Motor-driven: powered by a motor.
- Motorboat: a boat propelled by an internal combustion or electric engine.
- Motorized: equipped with a motor.
- Motoryacht: a yacht propelled by a motor.
- Mottled: marked with spots or smears of color.
- Mould-grown: covered or infested with mold.
- Mouldable: capable of being shaped or formed.
- Mouldering: slowly decaying or disintegrating.
- Moulting: shedding old feathers, hair, or skin to make way for new growth.
- Mountainous: having many mountains.
- Mournful: feeling or expressing sorrow or grief.
- Mousterian: relating to the Paleolithic culture characterized by flint tools.
- Movable: capable of being moved.
- Movie-worthy: suitable for or deserving of being made into a movie.
- Moving: producing strong emotion, especially sadness or sympathy.
- Mowable: capable of being mowed.
- Mower: a machine for cutting grass.
- Mozambican: relating to Mozambique or its people.
- Mozarabic: relating to the Christian inhabitants of Spain under Muslim rule.
- Mozartean: relating to or characteristic of Mozart or his works.
- Mud-caked: covered in mud.
- Mud-encrusted: covered with a crust of dried mud.
- Mud-free: free of mud.
- Mud-plastered: coated or smeared with mud.
- Mud-splattered: covered with splashes of mud.
- Muddle-headed: confused in thought.
- Muddled: in a state of bewildered or bewildering confusion.
- Muddy: covered in or full of mud.
- Mugged: attacked and robbed in a public place.
- Muggier: more humid and uncomfortable.
- Muggy: unpleasantly warm and humid.
- Mugwort: a type of plant.
- Mulatto: a person of mixed white and black ancestry.
- Mulch-covered: covered with mulch.
- Mulched: covered with or made of mulch.
- Mule-drawn: pulled by a mule.
- Mule-footed: having feet resembling those of a mule.
- Mulierian: relating to women.
- Mullion: a vertical bar between the panes of glass in a window.
- Multangular: having many angles.
- Multanimous: having many forms or kinds.
- Multi-colored: having many colors.
- Multi-talented: having many talents.
- Multi-tasking: dealing with more than one task at the same time.
- Multi-user: designed to be used by multiple users.
- Multi-vehicle: involving multiple vehicles.
- Multicolored: having many colors.
- Multicultural: relating to or constituting several cultural or ethnic groups within a society.
- Multidimensional: having or relating to multiple dimensions or aspects.
- Multifaceted: having many facets or aspects.
- Multifactorial: involving or dependent on many factors.
- Multifamily: designed to be occupied by more than one family.
- Multifunction: having multiple functions.
- Multilateral: agreed upon or participated in by three or more parties, especially the governments of different countries.
- Multilingual: using or able to use several languages.
- Multimedia: using more than one medium of expression or communication.
- Multiparty: involving several political parties.
- Multiphase: having multiple phases.
- Multipurpose: having several purposes.
- Multiracial: made up of or relating to people of many races.
- Multiscale: involving multiple scales or levels.
- Multiscene: involving or depicting multiple scenes.
- Multisensory: involving or using multiple sensory modalities.
- Multisite: involving multiple sites.
- Multispindle: having multiple spindles.
- Multistage: having multiple stages.
- Multistep: involving several steps.
- Multistorey: having multiple floors or levels.
- Multistrand: consisting of multiple strands.
- Multisystem: involving multiple systems.
- Multitasking: performing multiple tasks simultaneously.
- Multituberculate: having multiple tubercles.
- Multivariable: involving multiple variables.
- Multivocal: having many meanings or interpretations.
- Mummied: preserved as a mummy.
- Mummified: preserved by embalming and drying.
- Mumpsimus: a traditional custom or notion adhered to although shown to be unreasonable.
- Muncie: relating to Muncie, Indiana.
- Mundane: lacking interest or excitement; dull.
- Mundivagant: wandering over the world.
- Mung-bean: a type of legume.
- Municipal: relating to a city or town or its governing body.
- Munificent: larger or more generous than is usual or necessary.
- Murallike: resembling a wall.
- Murally-decorated: decorated with murals.
- Murk: darkness or thick mist that makes it difficult to see.
- Murky: dark and gloomy, especially due to thick mist.
- Murrain: an infectious disease, especially in cattle.
- Murre: a type of seabird.
- Murrey: a dark red or purplish color.
- Murry: relating to a dark red or purplish color.
- Muscarinic: relating to or denoting nerve cells or receptors that are stimulated by muscarine.
- Musciform: shaped like a fly.
- Musclebound: having excessively large muscles.
- Muscled: having well-developed muscles.
- Muscular: relating to or affecting the muscles.
- Muse: a source of inspiration.
- Museum-quality: suitable for display in a museum.
- Mushroomed: having rapidly grown or increased in size.
- Mushy: soft and pulpy.
- Music-filled: filled with music.
- Music-induced: caused or influenced by music.
- Musical: relating to music.
- Musicological: relating to the scholarly study of music.
- Muslin: a lightweight cotton cloth in a plain weave.
- Muso: relating to or characteristic of musicians.
- Musselman: a follower of Islam; a Muslim.
- Mussolinean: relating to Mussolini or his policies.
- Must-have: something that is essential or highly desirable.
- Must-read: something that must be read.
- Must-see: something that must be seen.
- Mustachioed: having a mustache.
- Musty: having a stale, moldy, or damp smell.
- Musular: relating to muscles.
- Mutagenic: causing genetic mutation.
- Mutagenous: capable of causing mutation.
- Mutant: resulting from or showing the effect of mutation.
- Mutarotational: relating to the change in optical rotation.
- Muted-color: having subdued or softened colors.
- Mutilated: inflicted serious damage on.
- Mutinied: refused to obey orders and attempted to take control.
- Mutinous: refusing to obey the orders of a person in authority.
- Mutt: a dog of mixed breed.
- Mutton-chopped: having large sideburns that are narrow at the temples and broad and rounded at the lower jaws.
- Mutual: held in common by two or more parties.
- Muzzled: having a device placed over the mouth to prevent biting or speaking.
- Mysterious: difficult or impossible to understand, explain, or identify.
- Mystic: relating to mysticism or religious mystics.
- Mythical: occurring in or characteristic of myths or folk tales.