Where does “päätäntövalta” come from?

päätäntövalta (Finnish) comes from Finnish päätäntö, from Finnish päättää, from Finnish pää, from Proto-Finnic pää, from Proto-Uralic päŋe — head.

Ancestry of “päätäntövalta”, step by step

päätäntövalta traces back through two separate lines of ancestry.

via Finnish päätäntö

StepLanguageWordMeaning
1Finnishpäätäntöconclusion final part of a text, especially an essay
2Finnishpäättääto end, conclude, terminate, finish, bring to a close
3Finnishpäähead; end, tip
4Proto-Finnicpäähead
5Proto-Uralicpäŋehead

via Finnish valta

StepLanguageWordMeaning
1Finnishvaltapower, authority, rule; main, principal; country,...
2Proto-Finnicvaltamight, power, authority; white
3Proto-Germanicwaldąmight, power, authority
4Proto-Indo-Europeanwaldʰ-to be strong, be powerful, prevail, possess
Every word from Proto-Uralic päŋe →Every word from Proto-Finnic pää →Every word from Finnish pää →