Re: [tied] Re: PIE Ablaut

> The only thing of which I am certain is that Brugmann's "Law", as
> originally formulated, has many exceptions like ávi- and ápas; and,
> according to Collinge, Hirt accumulated 67 such non-conforming etyma.

avi and apas do not have the ablauting vowel - therefore Brugmann's law does
not apply.
I cannot speak for the other 65 examples, but presumably some of them also
are not the ablaut vowel.
It is the -o- from -e/o- that specifically > a: in Skt.

Peter