Where does “jästipää” come from?

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

jästipää (Finnish): dumbhead

Definitions

  1. dumbhead

Ancestry of “jästipää”, step by step

jästipää traces back through two separate lines of ancestry.

via Finnish jästi

StepLanguageWordMeaning
1Finnishjästimuggle non-magical person in J. K. Rowling's Harry Potter series
2Swedishjästyeast
3Old Swedishiæster—
4Old Norsejǫstryeast
5Proto-Germanicjestuzfermentation; byproducts or agents of...
6Proto-Indo-Europeanyes-to foam; to boil

via Finnish pää

StepLanguageWordMeaning
1Finnishpäähead; end, tip
2Proto-Finnicpäähead
3Proto-Uralicpäŋehead
Every word from Proto-Indo-European yes- →Every word from Proto-Germanic jestuz →Every word from Old Norse jǫstr →