Where does “peittyminen” come from?

peittyminen (Finnish) comes from Finnish peittyä, from Finnish peittää, from Proto-Finnic peittädäk, from Proto-Finnic pej-, from Proto-Uralic *pälkä — thumb.

Ancestry of “peittyminen”, step by step

StepLanguageWordMeaning
1Finnishpeittyäto become covered, to be coated
2Finnishpeittääto cover
3Proto-Finnicpeittädäkto cover; to hide, to conceal
4Proto-Finnicpej-—
5Proto-Uralic*pälkäthumb
Every word from Proto-Uralic *pälkä →Every word from Proto-Finnic pej- →Every word from Proto-Finnic peittädäk →