Where does “ruhjoutuma” come from?

ruhjoutuma (Finnish) comes from Finnish ruhjoutua, from Finnish ruhjoa, from Finnish -oa, from Proto-Finnic -odak, from Proto-Uralic -w-.

Ancestry of “ruhjoutuma”, step by step

StepLanguageWordMeaning
1FinnishruhjoutuaTo be maimed
2Finnishruhjoato mangle, mutilate
3Finnish-oaForms frequentative verbs, primarily from nouns...
4Proto-Finnic-odakForms some verbs
5Proto-Uralic-w-—
Every word from Proto-Uralic -w- →Every word from Finnish -oa →Every word from Proto-Finnic -odak →