Where does “kalasääksi” come from?

kalasääksi (Finnish) comes from Finnish kala, from Proto-Finnic kala, from Proto-Uralic kälä — fish.

Ancestry of “kalasääksi”, step by step

kalasääksi traces back through two separate lines of ancestry.

via Finnish kala

StepLanguageWordMeaning
1Finnishkalafish; fishing; seafood
2Proto-Finnickalafish
3Proto-Uralickäläfish

via Finnish sääksi

StepLanguageWordMeaning
1Finnishsääksiosprey; Translative singular form of sää
2Proto-Finnicsääkciosprey
3Proto-Finno-Ugricśäkće—
Every word from Proto-Uralic kälä →Every word from Proto-Finnic kala →Every word from Finnish kala →