Where does “sortuminen” come from?

sortuminen (Finnish) comes from Finnish sortua, from Ingrian -ua, from Finnish -ttää, from Proto-Finnic -ttadak, from Proto-Uralic -kta-.

Ancestry of “sortuminen”, step by step

StepLanguageWordMeaning
1Finnishsortuato crumble, fall, collapse, cave in
2Ingrian-uaUsed to form inchoative verbs
3Finnish-ttääFront vowel variant of -ttaa
4Proto-Finnic-ttadakCreates causative verbs from regular verbs,...
5Proto-Uralic-kta-—
Every word from Proto-Uralic -kta- →Every word from Finnish -ttää →Every word from Proto-Finnic -ttadak →