Where does “huuhtoutuma” come from?

huuhtoutuma (Finnish) comes from Finnish huuhtoutua, from Finnish -utua, from Finnish -ua, from Proto-Finnic -üdäk — Forms mainly passive or anticausative verbs.

Ancestry of “huuhtoutuma”, step by step

StepLanguageWordMeaning
1Finnishhuuhtoutuato be washed (away), be rinsed (away), be eroded (away), be swept (away), to leach
2Finnish-utua
3Finnish-uaForms stative or inchoative intransitive verbs...
4Proto-Finnic-üdäkForms mainly passive or anticausative verbs
Every word from Proto-Finnic -üdäkEvery word from Finnish -uaEvery word from Finnish -utua