köken: From Old Norse um, from Proto-Germanic *umbi, from Proto-Indo-European *h₂m̥bʰi. * As a conjunction, um superseded or blended with Old Norse ef and em, taking on their function as well. This is from Proto-Germanic *jabai (“when, if”), whence also English if and German ob. Doublet of jäv, direct descendant of ef (see that for more)
köken: From Proto-Finnic *-ssa, from earlier *-s-na, from *-s- (internal locative infix; see Proto-Finnic *-s-) + *-na (locative case suffix). Cognate with Erzya -со (-so), -сэ (-së).
köken: From Proto-Balto-Slavic *pa, from Proto-Indo-European *h₂pó. Balto-Slavic cognates include Lithuanian pa-, Old Prussian pa-, po-, Proto-Slavic *po.
Etymology tree Proto-Indo-European *h₁énder. Proto-Slavic *vъ(n) Old Polish w Polish w Proto-Indo-European *h₃ebʰi Proto-Balto-Slavic *ab Proto-Slavic *o(b) Proto-Indo-European *kʷelh₁- Proto-Indo-European *-os Proto-Slavic *kolo Proto-Slavic *okolo Old Polish około Polish około univ. Polish wokoło Univerbation of w + około.