argument structure k'u etc.

[Koontz John E]

On Mon, 4 Apr 2005, Jan F. Ullrich wrote:
> > (1)        w-o-'uN-k'u-pi    'they fed us (gave us things)'
>
> I have been under the assumtion that wo in these compounds is
> a contraction of wo'yute 'food'
> (wo'yute k?u' -> wo'k?u).

Is there a precedent for such extreme reductions?