U+06C9 Arabic Letter Kirghiz Yu

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Waw (wāw "hook") is the sixth letter of the Semitic abjads, including Phoenician wāw 𐤅, Aramaic waw 𐡅, Hebrew vav ו‎, Syriac waw ܘ and Arabic wāw و‎ (sixth in abjadi order; 27th in modern Arabic order).

It represents the consonant [w] in classical Hebrew, and [v] in modern Hebrew, as well as the vowels [u] and [o]. In text with niqqud, a dot is added to the left or on top of the letter to indicate, respectively, the two vowel pronunciations.

It is the origin of Greek Ϝ (digamma) and Υ (upsilon), Cyrillic У and V, Latin F and V and later Y, and the derived Latin- or Roman-alphabet letters U and W.