Where does “törkkiminen” come from?

törkkiminen (Finnish) comes from Finnish törkkiä, 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 “törkkiminen”, step by step

StepLanguageWordMeaning
1Finnishtörkkiäto push, to jostle
2Finnishtörkätäto jab or poke once
3Ingriantörkkägrater
4Russianтёркаgrater; float; huller
5Russian-каnow, just
6Proto-Slavic-ьka—
7Proto-Balto-Slavic-ikaʔ—
8Proto-Indo-European-ikeh₂—
Every word from Proto-Indo-European -ikeh₂ →Every word from Russian -ка →Every word from Proto-Slavic -ьka →