Proto-Northwest Caucasian language

Proto-Northwest Caucasian (sometimes abbreviated PNWC), also called Proto-West Caucasian (PWC) or Proto-Abkhaz-Adyghe, is the reconstructed common ancestor of the Northwest Caucasian languages. == Phonology == === Vowels === Proto-Northwest Caucasian, just like its descendants, had a very small vowel inventory, most commonly reconstructed as consisting of 2 vowels: /a/ and /ə/.