Where does “kaikenpuolinen” come from?

kaikenpuolinen (Finnish) comes from Finnish puolinen, from Finnish puoli, from Proto-Finnic pooli, from Proto-Uralic pälä — half.

Ancestry of “kaikenpuolinen”, step by step

kaikenpuolinen traces back through two separate lines of ancestry.

via Finnish puolinen

StepLanguageWordMeaning
1Finnishpuolinenlunch; Of location; being on a defined side of...
2Finnishpuolihalf; when followed by a number representing an...
3Proto-Finnicpoolihalf, side; half
4Proto-Uralicpälähalf

via Finnish kaikki

StepLanguageWordMeaning
1Finnishkaikkieverything; everyone, everybody; all-, omni-
2Finnish-tiForms caritive adverbs; Forms adverbs of manner
3Proto-Finnic-t'ikcaritive suffix
Every word from Proto-Uralic päläEvery word from Proto-Finnic pooliEvery word from Finnish puoli