|Cyrillic letter Ef|
|Derived from:||Greek letter Phi (Φ φ)|
|The Cyrillic script|
Ef or Fe (Ф ф; italics: Ф ф) is a Cyrillic letter, commonly representing the voiceless labiodental fricative /f/, like the pronunciation of ⟨f⟩ in "fill, flee, or fall". The Cyrillic letter Ef is romanized as ⟨f⟩. In some languages it is known as Fe.
The Cyrillic letter Ef was derived from the Greek letter Phi (Φ φ). It merged with an eliminated letter Fita (Ѳ) in the Russian alphabet in 1918.
The name of Ef in the Early Cyrillic alphabet is фрьтъ (fr̥tŭ or frĭtŭ), in later Church Slavonic and Russian form it became фертъ (fert).
In the Cyrillic numeral system, Ef has a value of 500.
The Slavic languages have almost no native words containing /f/. This sound did not exist in Proto-Indo-European (PIE). It arose in Greek and Latin from PIE *bʰ (which yielded Slavic /b/). In some instances in Latin, it represented historical th-fronting and derived from Proto-Indo-European *dʰ. In the Germanic languages, the f sound arose from PIE *p, which remained unchanged in Slavic. The letter ф is thus almost exclusively found in words of foreign origin, especially Greek (from φ and sometimes from θ), Latin, French, German, Dutch, English, and Turkic.
Example borrowings in Russian:
The few native Slavic words with this letter (in different languages) are examples of onomatopoeia (like Russian verbs фукать, фыркать etc.) or reflect sporadic pronunciation shifts:
Ef is the 21st letter of the Bulgarian alphabet; the 22nd letter of the Russian alphabet; the 23rd letter of the Belarusian alphabet; the 25th letter of the Serbian and Ukrainian alphabet; and the 26th letter of the Macedonian alphabet. It represents the consonant /f/ unless it is before a palatalizing vowel, when it represents /fʲ/.
|Unicode name||CYRILLIC CAPITAL LETTER EF||CYRILLIC SMALL LETTER EF|
|UTF-8||208 164||D0 A4||209 132||D1 84|
|Numeric character reference||Ф
|Named character reference||Ф||ф|
|KOI8-R and KOI8-U||230||E6||198||C6|
|Code page 855||171||AB||170||AA|
|Code page 866||148||94||228||E4|