| makrós |  | long | macr-[74] | Greek | μακρός (makrós), μακρότης (makrótēs) “length” | |
| mágnēs | | | magnet-[75] | Greek | μάγνης, μάγνητος (mágnēs, mágnētos) | bioelectromagnetism, biomagnetism, diamagnetic, diamagnetism, electromagnet, geomagnetic, magnesium, magnet, magnetic, magnetism, magnetite, magnetize, magnetobiology, magnetologist, magnetometer, magnetosome, manganese, paramagnetic, paramagnetism |
| maínesthai |  | crazy | man-, mant-[76] (ΜΑΝ)[77] | Greek | μαίνεσθαι (maínesthai), μανία (manía), μανικός (manikós), μάντις | hypermania, hypomania, kleptomania, mania, maniac, manic, megalomania, monomania, pyromania, pyromaniac |
| mēkhanḗ |  | machine or instrument | mechan-[79] | Greek | μῆχος, μηχανή (mēkhanḗ), μηχανικός (mēkhanikós) | machine, mechane, mechanics, mechanism, mechanize, mechanobiology, mechanophilia, mechanophobia |
| mégas |  | great, large | meg-, megal-[80] | Greek | μέγας, μεγάλου (mégas, megálou) | acromegaly, Megacles, megacycle, megalomania, megalopolis, megaphone |
| meîon |  | less | mei-[81] | Greek | μεῖον (meîon), μείωσις (meíōsis) | ameiosis, ameiotic, meiobenthos, meiosis, meiotic |
| mélas |  | black, dark | melan-[82] | Greek | μέλας, μέλανος (mélas, mélanos), μελανότης | amelanism, aphaeomelanism, eumelanin, hypermelanic, melancholic, melancholy, Melanesia, melanin, melanism, melanoblastoma, melanocyte, melanoma, melanophobia, melanophore, melanosis, melatonin, neuromelanin, pheomelanin |
| mélissa |  | bee | meliss-[83] | Greek | μέλισσα (mélissa) | melissophobia |
| mḗn |  | month | men- | Greek | μήν (mḗn) | menopause, menorrhea |
| mēninx |  | membrane | mening-[84] | Greek | μήνιγξ, μῆνιγγος (mēninx, mēningos) | leptomeninges, meninges, meningioma, meningitis, meninx |
| meíresthai |  | part | mer-[85] | Greek | μείρεσθαι (meíresthai), μέρος (méros) | antimere, antimeria, biopolymer, decamer, decamerous, dimer, dimeric, dimerism, dimerous, enantiomer, enneamer, heptamer, heterodimer, heterotetramer, hexamer, homodimer, homotetramer, isomer, isomeric, isomerism, mereology, merisis, merism, meristem, meristematic, meristic, meromorphic, metamere, metamerism, Moirai, monomer, monomeric, octamer, oligomer, oligomeric, pentamer, pentamerous, photopolymer, phytomer, polymer, tautomerism, telomer, telomere, tetramer, tetrameric, trimer, trimerize |
| mésos |  | middle | mes-[86] | Greek | μέσος (mésos) | Mesolithic, mesophile, mesophilic, mesoscopic, mesosphere, mesozoic |
| metá |  | above, among, beyond | met-, meta-[87] | Greek | μετά (metá) | metabolism, metalogic, metamorphic, metamorphosis, metaphase, metaphor, metaphysics, metastatic, meteor, method |
| métallon |  | mine | metall- [88] | Greek | μέταλλον (métallon), μεταλλικός (metallikós) | dimetallic, electrometallurgy, hydrometallurgy, metallic, metalloid, metallophobia, metallophone, metallurgist, metallurgy, organometallic, polymetal, polymetallic, pyrometallurgy, tetrametallic, trimetallic |
| métron |  | measure | meter-, metr- | Greek | μέτρον (métron) | anemometer, anemometric, antisymmetric, antisymmetry, asymmetric, asymmetry, axonometric, barometer, barometric, bathometer, diameter, diametric, dysmetria, graphometer, hexameter, hygrometer, hygrometry, isodiametric, isometric, isoperimetric, meter, metre, metric, metrology, metronome, monosymmetric, parameter, parameterize, parametric, parametrize, pentameter, perimeter, polymeter, symmetric, symmetry, telemeter, telemetric, telemetry, tetrameter, thermometer, trimeter, trimetric |
| mḗtēr |  | mother | metr-[89] | Greek | μήτηρ, μητρός (mḗtēr, mētrós), μητρικός (mētrikós) | haplometrosis, metrocyte, metropolis, pleometrosis |
| mikrós |  | small | micr-[90] | Greek | μικρός (mikrós), μικρότης | microbe, microcosm, microeconomics, micrometer, microphone, microscope, microscopic |
| mimeîsthai |  | repeat | mim-[91] | Greek | μιμεῖσθαι (mimeîsthai), μιμητικός (mimētikós), μίμος (mímos) | mime, mimeograph, mimesis, mimetic, mimic, necromimesis, pantomime, phenomime, psychomime, psychomimetic |
| míntha |  | mint | minth-[92] | Greek | μίνθα (míntha), μίνθη (mínthē), μινθάριον | Acanthomintha, Mentha, menthol, mint, Minthostachys |
| miseîn |  | hate | mis-[93] | Greek | μισεῖν (miseîn), μῖσος (mîsos) | misandrist, misandry, misanthrope, misanthropy, misocainea, misogamist, misogamy, misogynist, misogyny, misoneism, misopaedia, misophonia, misotheism |
| mítos |  | thread | mit-[95] | Greek | μίτος (mítos) | mitochondrion, mitosis, mitospore |
| mnâ | | | mn-[96] | Greek | μνᾶ (mnâ) | mina, mna |
| mnâsthai |  | memory | mne-[97] | Greek | μνᾶσθαι (mnâsthai), μνήμη (mnḗmē) | amnesia, amnesty, anamnesis, anamnestic, dysmnesia, Mneme, mneme, mnemonic |
| mónos |  | alone, only | mon-[98] | Greek | μόνος (mónos), μονάς, μονάδος (monás, monádos) | monachism, monad, monadic, monarchy, monastery, monastic, monasticism, monatomic, monism, monist, monk, monoid, monolith, monometer, monopod, monopoly, monopsony, monotone |
| mōrós |  | foolish, dull | mor-[99] | Greek | μωρός (mōrós) | moron, moronic, oxymoron, oxymoronic, sophomore, sophomoric |
| morphḗ |  | form, shape | morph-[100] | Greek | μορφή (morphḗ) | allomorph, amorphous, anamorph, anamorphic, anamorphism, anamorphosis, anthropomorphism, apomorphy, autapomorphy, automorphism, catamorphism, dimorphic, dimorphism, dysmorphic, dysmorphophobia, ectomorph, ectomorphic, enantiomorph, enantiomorphic, endomorph, endomorphic, epimorphism, geomorphology, hemimorphic, holomorph, holomorphic, holomorphism, homeomorphic, homeomorphism, homomorphic, homomorphism, hylomorphism, hypermorphosis, isomorphic, isomorphism, mesomorph, mesomorphic, metamorphic, metamorphism, metamorphosis, monomorphic, monomorphism, morpheme, Morpheus, morphine, morphology, morphosyntactic, morphosyntax, paramorph, peramorphism, peramorphosis, perimorph, plesiomorphy, polymorphic, polymorphism, pseudomorph, synapomorphy, teleomorph, teleomorphic, theriomorphic, trimorphic, trimorphism, zoomorph, zoomorphism |
| mûs |  | mouse | my-[101] | Greek | μῦς, μυός (mûs, muós), μυών | amyotrophic, electromyogram, electromyograph, electromyography, endomysium, epimysium, murine, musophobia, myoelectric, myomancy, myomorphous, myomorphy, myopathy, myositis, myotome, Nectomys, Oryzomys, perimysium, Sigmodontomys |
| múein |  | shut (the eyes) | my-[102] | Greek | μύειν (múein), μύσις (músis), μύστης (mústēs) | miosis, myopia, myopic, myosis, mystery |
| múkēs |  | fungus | mycet-[103] | Greek | μύκης, μύκητος (múkēs, múkētos) | ascomycete, basidiomycete, mycology, Mycoplasma, zygomycete, zygomycosis |
| mudríasis |  | dilate | mydr-[104] | Greek | μύδρος, μυδρίασις (mudríasis) | mydriasis |
| muelós |  | marrow | myel-[105] | Greek | μυελός (muelós) | amyelia, myeloblast, myelocyte, myelogenous, myeloid, myelopoiesis, poliomyelitis |
| múlē |  | mill | myl-[106] | Greek | μύλη (múlē), μύλος (múlos) | amyloid, amyloidosis, amylolysis, amylopectin, amylophagia, amyloplast, amylose, amylum |
| mys |  | muscle | myo- [107] | Greek | μυς (mys) | leiomyoma |
| muríos |  | countless, ten thousand | myri-[108] | Greek | μυρίος (muríos) | myriad, myriagon, myriagram, myriapod, myriapodology |
| múrmēx |  | ant | myrmec-[109] | Greek | μύρμηξ (múrmēx) | myrmecochory, myrmecoid, myrmecology, myrmecophobia, Myrmidons, myrmomancy |
| músos |  | uncleanness | mys-[110] | Greek | μύσος (músos) | mysophilia, mysophobia |
| mûthos |  | story | myth-[111] | Greek | μῦθος (mûthos) | mythic, mythology, mythomania, mythopoeia, mythos |
| múxa |  | slime | myx- | Greek | μύσσομαι, μύξα (múxa) | match, myxedema, myxoedema, Myxini, myxogastrid |
| muzáō |  | suck | myz-[112] | Greek | μυζάω (muzáō), μύζησις (múzēsis) | Myzopoda |
