Where does “iæster” come from?

iæster (Old Swedish) comes from Old Norse jǫstr, from Proto-Germanic jestuz, from Proto-Indo-European yes- — to foam; to boil.

Ancestry of “iæster”, step by step

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

Words derived from “iæster”

Every word from Proto-Indo-European yes- →Every word from Proto-Germanic jestuz →Every word from Old Norse jǫstr →