Where does “kupiś” come from?

kupiś (Lower Sorbian) comes from Proto-Slavic kupiti, from Proto-Germanic kaupōną, from Proto-Germanic kaupô, from Latin caupo, from Proto-Indo-European kaup-.

Ancestry of “kupiś”, step by step

StepLanguageWordMeaning
1Proto-Slavickupitito pile, to gather in one place; to buy, to trade
2Proto-Germanickaupōnąto buy; trade
3Proto-Germanickaupôinnkeeper; merchant
4LatincaupoTradesman; Innkeeper, shopkeeper
5Proto-Indo-Europeankaup-—
Every word from Proto-Indo-European kaup- →Every word from Latin caupo →Every word from Proto-Germanic kaupô →