| metrmetreNoun | Noun |
| metrometroNoun | Noun |
| mezibetweenPreposition | Preposition |
| mezinárodníinternationalAdjective | Adjective |
| Mgr.mgr.master's title (Mgr.)Noun | Noun |
| míčballNoun | Noun |
| migrénamigraineNoun | Noun |
| míchatstir; mixVerb | Verb |
| mikinasweatshirtNoun | Noun |
| mikrovlnkamicrowaveNoun | Noun |
| miláčekdarlingNoun | Noun |
| miliardabillionNoun | Noun |
| milimetrmillimetreNoun | Noun |
| miliónmillionNoun | Noun |
| milovatloveVerb | Verb |
| milýnice; kindAdjective | Adjective |
| miminkobabyNoun | Noun |
| miminobabyNoun | Noun |
| mincecoinNoun | Noun |
| minerálkamineral waterNoun | Noun |
| miniaturníminiature; very smallAdjective | Adjective |
| minimálněminimally, at leastAdverb | Adverb |
| minimálníminimalAdjective | Adjective |
| ministerstvoministryNoun | Noun |
| ministrministerNoun | Noun |
| ministryněfemale ministerNoun | Noun |
| minulostpastNoun | Noun |
| minulýlast; previousAdjective | Adjective |
| minusminusNoun | Noun |
| minutaminuteNoun | Noun |
| mírameasurement; fitNoun | Noun |
| misionářmissionaryNoun | Noun |
| místenkaseat reservationNoun | Noun |
| místnílocalAdjective | Adjective |
| místnostroomNoun | Noun |
| místoplaceNoun | Noun |
| mistrmasterNoun | Noun |
| mistrovstvíchampionshipNoun | Noun |
| místyin some placesAdverb | Adverb |
| míthaveVerb | Verb |
| mít sebe doing; have oneselfVerb | Verb |
| mítinkmeetingNoun | Noun |
| mizerabastard; nasty personNoun | Noun |
| mladěyoungAdverb | Adverb |
| mládekbrewer's assistantNoun | Noun |
| mládežyouthNoun | Noun |
| mladíkyoung manNoun | Noun |
| mladýyoungAdjective | Adjective |
| mlaskatsmack one’s lipsVerb | Verb |
| mlékomilkNoun | Noun |
| mlhafogNoun | Noun |
| mlsnýpicky; fond of treatsAdjective | Adjective |
| mluvitspeak; talkVerb | Verb |
| mňamyummyInterjection | Interjection |
| mňaumeowInterjection | Interjection |
| MnichovmnichovMunichNoun | Noun |
| mnohemmuch; by farAdverb | Adverb |
| mnohomany, muchNumber | Number |
| mnohokrátmany timesNumber | Number |
| mnohýmanyAdjective | Adjective |
| množstvíquantity; amountNoun | Noun |
| mobilmobile phoneNoun | Noun |
| mobilnímobileAdjective | Adjective |
| moca lot, much, very, tooAdverb | Adverb |
| mockrátmany timesAdverb | Adverb |
| moctcan; be able toVerb | Verb |
| močurineNoun | Noun |
| módafashionNoun | Noun |
| modelmodelNoun | Noun |
| modelkafemale modelNoun | Noun |
| moderněmodernly; in a modern styleAdverb | Adverb |
| modernímodernAdjective | Adjective |
| moderovathost; moderateVerb | Verb |
| módnífashionable; fashionAdjective | Adjective |
| modrýblueAdjective | Adjective |
| mokrowetAdverb | Adverb |
| mokrýwetAdjective | Adjective |
| momentmomentNoun | Noun |
| MongolmongolMongolian manNoun | Noun |
| MongolkamongolkaMongolian womanNoun | Noun |
| monitormonitorNoun | Noun |
| monotónnímonotonousAdjective | Adjective |
| morplagueNoun | Noun |
| MoravamoravaMoraviaNoun | Noun |
| moravskýMoravianAdjective | Adjective |
| morčátkoguinea pigNoun | Noun |
| morčeguinea pigNoun | Noun |
| mořeseaNoun | Noun |
| mořskýmarine, seaAdjective | Adjective |
| mostbridgeNoun | Noun |
| motivacemotivationNoun | Noun |
| motorengineNoun | Noun |
| motorkamotorbikeNoun | Noun |
| moukaflourNoun | Noun |
| možnámaybeAdverb | Adverb |
| možnostpossibility; optionNoun | Noun |
| možnýpossibleAdjective | Adjective |
| MP3mp3MP3Noun | Noun |
| mrakcloudNoun | Noun |
| mrázfrostNoun | Noun |