Where does “ruuhkautuma” come from?

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

Ancestry of “ruuhkautuma”, step by step

StepLanguageWordMeaning
1Finnishruuhkautuato be congested; to bottleneck
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