Maybe you are right but the dating should have to be older. (Late)
Proto-Baltic would give **s^unt- > **husi-. This reflex (from a post-
alveolar) original has many many parallels and no exceptions.
It should therefore be an even older Balto-Slavic palato-alveolar that
renders the reflex *s'-/*c'-.
A very young Latvian borrowing would give s- as well but this would
not render **sunti > susi though, because ti- > -si stopped to be
productive some 2000 years ago. It also does not fit the northern
distribution of the word.
Jouppe
--- In cybalist@yahoogroups.com, Piotr Gasiorowski <gpiotr@...> wrote:
>
> On 2008-04-15 23:51, jouppe wrote:
>
> > NB. Pre-Finnic seems to have borrowed *c'unti > susi 'wolf' from a
> > pregermanic dialect older than the centumisation of *k'. The dental
> > on the other hand rules out other IE dialects. Tricky. Pre- or
Para-
> > Germanic?
>
> Could be Proto-Baltic (cf. Latv. suntana 'large dog' from <suns>).
>
> Piotr
>