Where does “koolapähkinä” come from?

koolapähkinä (Finnish) comes from Finnish pähkinä, from Proto-Finno-Permic päškɜ.

Ancestry of “koolapähkinä”, step by step

koolapähkinä traces back through two separate lines of ancestry.

via Finnish pähkinä

StepLanguageWordMeaning
1Finnishpähkinänut; hazel; puzzle, riddle; difficult problem,...
2Proto-Finno-Permicpäškɜ

via Proto-Finnic koola

StepLanguageWordMeaning
1Proto-Finnickooladrool (saliva)
Every word from Proto-Finno-Permic päškɜEvery word from Finnish pähkinä
koolapähkinä — Etymology, Origin & Word History | Etymology Explorer