I would like to introduce a new consonant into Gzarondan phonology, namely a phonemic distinction between /x/ and /x_w/ (unlabialised versus labialised velar fricatives). I'm trying to decide what other changes to make to the phonology in order to make the new phoneme set look reasonably naturalistic. I would appreciate some advice. Intuitively, I feel that if there is a /x/ vs /x_w/ distinction then there ought to be a similar distinction for (at the very least) all fricatives and approximates at or behind the velar position. This would mean adding a /h/ vs /h_w/ distinction. Alternatively, I could do away with /h/ (but how many natural languages don't have /h/ ?) and use the /x/ vs /x_w/ distinction in place of the /x/ vs /h/ distinction. This conserves the total number of phonemes. Building on the above approach, I could rewrite history to say that all unvoiced fricatives once distinguished labialised and non-labialised forms, but that /T_w/ later became /f/ and /s_w/ later became /S/, whereas /x_w/ remained as it was. This sounds reasonable to me, but perhaps there's a better option. The current consonant phoneme inventory is listed below. Stops, Nasals & Trills: /p/ /b/ /m/ /t/ /d/ /n/ /r/ /k/ /g/ Fricatives, Laterals & Approximants: /f/ /T/ /D/ /s/ /z/ /K/ /l/ /S/ /j/ /x/ /h/ Adrian.