köken: Etymology tree Proto-Indo-European *peh₃- Proto-Indo-European *píph₃eti Proto-Italic *pibō Latin bibō Proto-Indo-European *h₃ed- Proto-Indo-European *-os Proto-Indo-European *h₃édosder.? Proto-Italic *-ōtsos or *-otsos Latin -ōsus Latin bibōsuslbor. Polish bibosz Learned borrowing from Latin bibōsus. First attested in 1688.