From: tgpedersen
Message: 44476
Date: 2006-05-04
>ending
> As for its origin, one can only speculate. My guess is that the
> was originally *-o:m < *-o-X-m, where *X is a pre-PIE plural markerSo the acc.pl. was originally similar to the gen.pl.? So was it used as
> (never mind its phonetic realisation for the moment) and *-m is the
> familiar acc. ending. The *-s is a later addition, marking plurality
> once again after the old marker had become obscured.