Where does “tyhmentyminen” come from?

tyhmentyminen (Finnish) comes from Finnish tyhmentyä, from Finnish tyhmentää, from Finnish tyhmä, from Finnish tuhma, from Proto-Finnic tuhma, from Proto-Germanic dusmaz.

Ancestry of “tyhmentyminen”, step by step

StepLanguageWordMeaning
1Finnishtyhmentyäto become dumber
2Finnishtyhmentääto dumb, make dumber; Third-person singular...
3Finnishtyhmädumb, stupid
4Finnishtuhmanaughty; dirty
5Proto-Finnictuhmastupid, foolish
6Proto-Germanicdusmaz—
Every word from Proto-Germanic dusmaz →Every word from Proto-Finnic tuhma →Every word from Finnish tuhma →