--- In
cybalist@yahoogroups.com, "tgpedersen" <tgpedersen@...> wrote:
> This is strange:
>
> Skt. Nsg pitá, Ds pitré (< *pitréi)
>
> Av. Nsg ptá:, Ds fðrái (< *pitréi)
It's a result of the r:
px,tr-
pxtr-
ptr-
ptHr-
pTr-
fTr-
fðr-
x() > -syl. /
x > 0 /
stop-voice > +aspir / _C+sonor/G
stop+aspir > +contin.
stop > +contin / _obs.+contin.
obs.+contin. > +voice / obs.+contin._
The last rule is part of the shift of xT > Gð, etc., seen in
intermediate stages in Av. (*wekWto- 'spoken' > uxða-).