From: Miguel Carrasquer
Message: 37256
Date: 2005-04-19
>First, if *gWew- were missing (as it seems to me), that would still be notable, would it not?But this word doesn't have g~. It's <gud> (or <gu4>).
>
>But to answer your question directly, Sumerian g~u-4 is "ox"; the circumflex indicates an initial dorsal nasal (/ng/).
>A loanword is often supposed from Sumerian into IE (although I believe both had a common origin).But it can't be gwow- (which would have given Skt. gv-,
>
>An initial voiced dorsal nasal, regardless of the source, would have been simplified in IE to *g (*gW is an unrelated phenomenon). I can only assume that *gVwVw-, under the influence of the stress-accent, became *gwVw- (zero-grade).