From: Miguel Carrasquer Vidal
Message: 6971
Date: 2001-04-04
>Now, in the case of collective suffixes or any other more secondaryThis makes no sense: either your *-xe was _not_ univerbated, and thus
>suffixing outside of the declensional paradigm, the *n was NOT retained. For
>the collective of *wat:n, we are simply adding an optional suffix *-xe
>(later *-x or that devilish lengthening) to the bare nomino-accusative stem.
>Due to the strict penultimate accent of that time prior to vowel loss, we
>may only reconstruct *wet:án-xe with accent on the _second_ syllable. (Also
>note the *a/*e rule: When the accent is off of a stem with accented *-a-, it
>becomes *-e- (schwa))
>
>When *wat:n became *wat:r, the collective form followed suit as *wet:ár-xe.
>The reason is that the collective suffix, while used occasionally, was never
>a systematic and regular part of the declension.