Kranditri Classification/Ф

Ef (Ф, ф) is a Cyrillic letter, commonly representing the voiceless labiodental fricative /f/, like the pronunciation of ⟨f⟩ in “fill.” The Cyrillic letter Ef is romanized as ⟨f⟩. 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. In the Cyrillic numeral system, Ef has a value of 500.