Where does “kastuminen” come from?

kastuminen (Finnish) comes from Finnish kastua, from Finnish kastaa, from Proto-Finnic kastadak, from Proto-Finnic -tadak, from Proto-Uralic -ta- — Forms verbs from nouns; Forms causative verbs...

Ancestry of “kastuminen”, step by step

StepLanguageWordMeaning
1FinnishkastuaTo wet
2Finnishkastaato dip, sop; to baptize/baptise
3Proto-Finnickastadakto wet, to soak; to dip, to immerse
4Proto-Finnic-tadakForms verbs from both nominal and verbal stems
5Proto-Uralic-ta-Forms verbs from nouns; Forms causative verbs...
Every word from Proto-Uralic -ta- →Every word from Proto-Finnic -tadak →Every word from Proto-Finnic kastadak →