> *-oi (preverbs in -ai)
Sorry, adverbs, of course. By the way, other adverbs (in -i`, like _arti`_
'near' etc) still point to *-éi (with acute accent!) . I have no answer to
the question why the agglutination of *-én (to the *-o-stems' locative) has
eventually yielded a simple -e` rather than something like *-eje` or *-aje`
in the noun paradigm (why _kieme`_ 'in (the) yard' rather than *_kiemeje`_
or _kiemaje`_?)
Sergei