Where does “pestaaminen” come from?

pestaaminen (Finnish) comes from Finnish pestata, from Old Swedish fästa, from Old Norse fasta, from Proto-Germanic fastāną, from Proto-Germanic -āną, from Proto-Germanic -ajaną, from Proto-Indo-European -oyéti, from Proto-Indo-European -yéti — he, she.

Ancestry of “pestaaminen”, step by step

StepLanguageWordMeaning
1Finnishpestatato hire
2Old Swedishfästato sign on, to engage
3Old Norsefasta
4Proto-Germanicfastānąto observe, hold firm to; to fast, to abstain...
5Proto-Germanic-ānąCreates factitive verbs from adjectives, later...
6Proto-Germanic-ajaną
7Proto-Indo-European-oyétiCreates factitive verbs from adjectives
8Proto-Indo-European-yétiCreates intransitive, often deponent,...
9Proto-Indo-Europeanyé-
10Chichewaiyehe, she
Every word from Chichewa iyeEvery word from Proto-Indo-European -yétiEvery word from Proto-Germanic -āną