Where does “uss-” come from?

uss- (Proto-Indo-European) comes from Proto-Indo-European uds-, from Proto-Indo-European úd — out, outward.

Ancestry of “uss-”, step by step

StepLanguageWordMeaning
1Proto-Indo-Europeanuds-up, out
2Proto-Indo-Europeanúdout, outward

Words derived from “uss-”

Every word from Proto-Indo-European úd →Every word from Proto-Indo-European uds- →