U-breve

"Ŭ", or "ŭ", is a vowel and letter in the Esperanto alphabet. Since each letter in Esperanto has a consistent sound, this letter is always pronounced the same; its sound is represented by [w] in SAMPA.

See also: Esperanto orthography, Ĉ, Ĝ, Ĥ, Ĵ, Ŝ