Where does “puolivalo” come from?

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

Ancestry of “puolivalo”, step by step

puolivalo traces back through two separate lines of ancestry.

via Finnish puoli

StepLanguageWordMeaning
1Finnishpuolihalf; when followed by a number representing an...
2Proto-Finnicpoolihalf, side; half
3Proto-Uralicpälähalf

via Finnish valo

StepLanguageWordMeaning
1Finnishvalolight
2Proto-Finnicvalolight visible radiation
3Proto-Finno-Ugricwaĺɜ—
Every word from Proto-Uralic pälä →Every word from Proto-Finnic pooli →Every word from Finnish puoli →