Overview

The Cyrillic letter Ef, written as Ф (uppercase) and ф (lowercase), represents the sound typically transcribed as /f/ in phonetic notation. It is one of the common consonants in modern Slavic and non-Slavic languages that use the Cyrillic script, including Russian, Bulgarian, Ukrainian, Serbian, Macedonian and Belarusian.

Name and form

In contemporary usage the letter is usually called "ef" (pronounced like the English letter F). Historically, in Old Church Slavonic and early Cyrillic traditions it had an older name sometimes rendered as fert. Visually the uppercase resembles the Greek Φ, often shown as a circle bisected by a vertical stroke; the lowercase has a distinct cursive form but corresponds to the same phoneme.

Pronunciation and function

Phonetically, Ef denotes the voiceless labiodental fricative /f/. It contrasts with the voiced labiodental fricative /v/ (written with the Cyrillic letter В). In word position and across languages the letter behaves like other obstruents: it participates in assimilation processes and appears in native words and many loanwords.

History and origin

The letter was adopted into the Cyrillic alphabet from the Greek Greek letter phi, which historically had a related value. Cyrillic developed in the First Bulgarian Empire and other Slavic cultural centers during the medieval period, borrowing several letters from Greek to represent sounds not originally present in the Greek inventory.

Usage and examples

Ef is common in words for modern technical, scientific and cultural vocabulary often borrowed from Latin or Greek roots. Examples across languages include words meaning "film", "photo", "physics" and many personal and place names. Typical transliteration into the Latin alphabet is the letter F.

Notable facts

  • Unicode code points: U+0424 (uppercase) and U+0444 (lowercase).
  • In older Cyrillic numeral systems letters sometimes carried numerical values; in modern orthographies Ef is used solely as a letter.
  • Ef is distinct from similar-looking letters in other scripts: it derives from Greek Φ but corresponds to Latin F in sound.