Where does “pohjajää” come from?

pohjajää (Finnish) comes from Finnish jää, from Proto-Finnic jää, from Proto-Uralic jäŋe — ice.

pohjajää (Finnish): anchor ice submerged ice anchored to the bottom of a river etc

Definitions

  1. anchor ice submerged ice anchored to the bottom of a river etc

Ancestry of “pohjajää”, step by step

pohjajää traces back through two separate lines of ancestry.

via Finnish jää

StepLanguageWordMeaning
1Finnishjääice; rock; in the expression on the rocks =...
2Proto-Finnicjääice
3Proto-Uralicjäŋeice

via Finnish pohja

StepLanguageWordMeaning
1Finnishpohjabottom; bed; fundament
2Proto-Finnicpohjabottom; base, foundation; north
3Proto-Finno-Permicpošja—
Every word from Proto-Uralic jäŋe →Every word from Proto-Finnic jää →Every word from Finnish jää →