U with double acute (Cyrillic)

U with double acute (Ӳ ӳ; italics: Ӳ ӳ ) is a letter of the Cyrillic script, derived from the Cyrillic letter U (У у У у ).

U with double acute is used only in the alphabet of the Chuvash language, where it represents the close front rounded vowel, the pronunciation of the Ü|Latin letter U with umlaut (Ü ü) in German. It is placed between $⟨У⟩$ and $⟨Ф⟩$ in the Chuvash alphabet. It is usually romanized as ⟨Ü⟩ but its ISO 9 transliteration is ⟨Ű⟩.

It was also formerly used in the Altai alphabet of 1840.