Where does “ystare” come from?

ystare (Swedish) comes from Swedish ysta, from Old Swedish ysta, from Old Norse ysta, from Proto-Germanic justijaną, from Proto-Germanic -janą, from Proto-Indo-European -yéti, from Proto-Indo-European yé-, from Chichewa iye — he, she.

Ancestry of “ystare”, step by step

StepLanguageWordMeaning
1Swedishystato make cheese
2Old Swedishysta—
3Old Norseysta—
4Proto-Germanicjustijanąto curdle; to make cheese
5Proto-Germanic-janąDerives denominatives from nouns and factitives...
6Proto-Indo-European-yétiCreates intransitive, often deponent,...
7Proto-Indo-Europeanyé-—
8Chichewaiyehe, she
Every word from Chichewa iye →Every word from Proto-Germanic -janą →Every word from Proto-Indo-European -yéti →