Re: [tied] fresh

Piotr Gasiorowski wrote:

> The word has been borrowed to and fro between Germanic and Romance,
> but is ultimately Germanic. I suppose it's a derivative of *prei-
> 'come first', as in Lat. prior (*prijo:s) and pri:scus (*preisko-):
> *pri-sko- > PGmc. *friska-. The semantic development would have been
> 'new, introduced for the first time' > 'raw, untreated' > 'unsalted'
> etc
>
> Piotr

In this case how is to explain the Greek form "prosfat" if the root
should be a germanic *preska-?
Wherefrom the greek "sf" here?