Where does “jest” come from?

jest (Old Frisian) comes from Proto-West Germanic jestu, from Proto-Germanic jestuz, from Proto-Indo-European yes- — to foam; to boil.

Ancestry of “jest”, step by step

StepLanguageWordMeaning
1Proto-West Germanicjestufermentation; byproducts or agents of...
2Proto-Germanicjestuzfermentation; byproducts or agents of...
3Proto-Indo-Europeanyes-to foam; to boil

Words derived from “jest”

Every word from Proto-Indo-European yes- →Every word from Proto-Germanic jestuz →Every word from Proto-West Germanic jestu →
jest — Etymology, Origin & Word History | Etymology Explorer