> In Romanian is apa , in Baltic too, so you need to increase this
> areal: a huge part of Europe is affected
>
> Marius
I think the Proto-Baltic form was *upYa: < *xx,pY+ (the 0-grade of
*xaxpY+ < *xaxkYw+). The Romanian seems to be directly from Latin
aqua < *xakYw+ with kw > p and so not directly related to the PIE
alternations.