In orthography, the letter ‘v’ is used. In the 1950s when the Reeds started writing the language, that was a convenient (and unused) letter on the typewriter. It is the least frequent vowel (>1%), and in fact the least frequent phoneme (>0.5%) in the language. It mostly occurs with /a/ or /ɨ/ in an adjacent syllable. In all but one word (tibanglvn) /a/ and /ɨ/ are the only vowels used. (One exception noted: the name of a river near Tundayaw is Guribvy.)