Peter:
>*-o:u is not established (as far as I know) for the dual,
Well, at least in *dwo:u and *okto:u, which is, I presume
what Miguel is referring to in part. These are duals. It is
_this_ dual ending that I think comes from a stem ending
in MIE *-a- followed by a collective suffix *-xe, forming a
stem that ends in *-axe (> eLIE *-ax > *-a: > *-o: >
PIE *-o:u).
>[...] whereas the -H ending has been suggested for quite a long time, and
>seems to have wider acceptance.
Yes, but here too, assuming that it is a laryngeal and not a
long vowel, I fail to see how it must necessarily be *hW (*h3),
either, as Miguel insists. I don't know of any secure suffix
that is known to end in a labial-marked phoneme like *hW or
*kW.
= gLeN
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