Where does “roub ~ reub-” come from?

roub ~ reub- (Proto-Indo-European) comes from Proto-Indo-European reup.

Ancestry of “roub ~ reub-”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	reup	—

Words derived from “roub ~ reub-”

Every word from Proto-Indo-European reup →

roub ~ reub- — Etymology, Origin & Word History | Etymology Explorer