Where does “oba-” come from?

oba- (Serbo-Croatian) comes from Old Tupi îub, from Old Tupi -a, from Old Tupi pó, from Proto-Tupi-Guarani *po, from Proto-Tupian *po — hand.

Ancestry of “oba-”, step by step

StepLanguageWordMeaning
1Old Tupiîubto lie
2Old Tupi-aforms nouns from a word's stem
3Old Tupipóhand
4Proto-Tupi-Guarani*pohand
5Proto-Tupian*pohand

Words derived from “oba-”

Every word from Proto-Tupian *po →Every word from Old Tupi -a →Every word from Old Tupi îub →