> If it is so "obvious", how about a couple of other 'voicings"?
> Then I will try to explain it.
> Patrick
*pi-bh3-e/o- itself is quite impressive, since
(1) we know for sure that the laryngeal is *h3,
and
(2) the voicing must be at least Proto-CoreIE, given the agreement of
Celtic, Indo-Iranian, Armenian (plus, partly, Italic and, possibly, Old
Albanian).
Next, we have the Latin stems in -g-on-, where the nasal extension is
probably to be identified with the Hoffmann suffix, and the
corresponding unextended stems display -k- (vorax : vora:go:, etc.). The
Hoffmann sufix can also be reconstrucred in Celtic *abon- 'river' (cf.
*h2ap- 'water'). If the suffix is *-h3on-, it gives us quite a handful
of words with h3-induced voicing.
Piotr