>
> Isn't it obvious? haita haitis haitiþ vs. hait, haist,
> hait. OS, OHG io (not iu) confirms this.
No, not to me. Is Gothic taken to have *added* reduplication? Is the
reflex of a putative pre-Gmc. *-ei- taken to be something which
never appears as the reflex of *-ei- in present stems?