Where does “jöstur” come from?

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

jöstur (Icelandic): yeast

Definitions

  1. yeast

Ancestry of “jöstur”, step by step

StepLanguageWordMeaning
1Old Norsejǫstryeast
2Proto-Germanicjestuzfermentation; byproducts or agents of...
3Proto-Indo-Europeanyes-to foam; to boil
Every word from Proto-Indo-European yes- →Every word from Proto-Germanic jestuz →Every word from Old Norse jǫstr →