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 only used in the Chuvash language, where it represents the close front rounded vowel /y/, the pronunciation of the 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.