Where does “törkkääminen” come from?

törkkääminen (Finnish) comes from Finnish törkätä, from Ingrian törkkä, from Russian тёрка, from Russian -ка, from Proto-Slavic -ьka, from Proto-Balto-Slavic -ikaʔ, from Proto-Indo-European -ikeh₂.

Ancestry of “törkkääminen”, step by step

StepLanguageWordMeaning
1Finnishtörkätäto jab or poke once
2Ingriantörkkägrater
3Russianтёркаgrater; float; huller
4Russian-каnow, just
5Proto-Slavic-ьka—
6Proto-Balto-Slavic-ikaʔ—
7Proto-Indo-European-ikeh₂—
Every word from Proto-Indo-European -ikeh₂ →Every word from Russian -ка →Every word from Proto-Slavic -ьka →