Overview

The letter Em, written М in uppercase and м in lowercase, is a fundamental consonant of modern Cyrillic alphabets. It normally represents the voiced bilabial nasal consonant, transcribed in the International Phonetic Alphabet as /m/. Em occupies a similar position and function across Russian, Ukrainian, Bulgarian, Serbian (Cyrillic), Belarusian and many non‑Slavic languages that use Cyrillic orthographies.

Form and pronunciation

Graphically the capital М closely matches the Latin capital M; the lowercase м often resembles the Latin small m but shows regional and typographic variation. In handwriting and cursive styles the shape of lowercase м can differ noticeably; learners sometimes confuse these forms with Latin letters until they become familiar with the script's conventions. Phonetically Em denotes the voiced bilabial nasal, and in languages with phonemic palatalization the consonant can appear in a palatalized variant [mʲ] before front vowels or the soft sign.

History and origin

Em traces its ancestry to the Greek letter mu, a connection reflected in both shape and name. The letter was incorporated into the early Cyrillic alphabet during the 9th–10th century adaptations of Greek script to Slavic speech. Comparative discussions often cite the Greek mu and the Latin M when explaining its development and continued correspondence in modern alphabets.

Uses and examples

  • Phonetic example: Russian мама (mama, "mother") begins with Em and illustrates its basic sound.
  • Orthography: Em appears in virtually all Cyrillic‑based orthographies and is routinely transliterated as the Latin letter M in scholarly and practical systems.
  • Historical numerals: in early Cyrillic numeral systems, following the model of Greek numerals, the letter had an associated numeric value.

Encoding and typographic notes

In digital text Em is encoded separately for uppercase and lowercase forms in character sets such as Unicode, and type designers pay attention to its relationship with Latin M to avoid visual confusion in multilingual settings. The letter's ubiquity and straightforward sound make it one of the most stable elements of the Cyrillic inventory, retained with little change across centuries and languages.