Where does “selkiytys” come from?

selkiytys (Finnish) comes from Finnish selkiyttää, from Finnish selkeä, from Proto-Finnic selkedä — clear.

Ancestry of “selkiytys”, step by step

StepLanguageWordMeaning
1FinnishselkiyttääAlternative form of selkeyttää
2Finnishselkeäclear, sunny; Up to 1/8 covered by clouds; clear
3Proto-Finnicselkedäclear
Every word from Proto-Finnic selkedä →Every word from Finnish selkeä →Every word from Finnish selkiyttää →