COMMENT: The comparison between EC and WC forms seems quite plausible both phonetically and semantically. Labialisation of *-q̇w- is suggested by PD *-ḳ- (but it may be secondary, due to progressive labialisation). There is also a possibility of a reflex in Lak.: cf. Lak. ut:u-s:a '(wooden) beam', which may go back to *q̇wɨ̆d(w)V with metathesis.
