From: Piotr Gasiorowski
> If you can keep a secret until I have published it (which must beVery interesting. Semantically elegant, and the extra *h1 would nicely
> soon anyway), I will just say that my present understanding of the
> stative marker is that it is /-H1eH1-/, identical with the
> instrumental case-ending (allowing, e.g., Ved. sus.t.utiá: with
> syllabic -i-), and further identical with the suffix of s-stems (s/t-
> stems) and with root *H1es- 'be'. These all share an essive or
> fientive function.