Where does “salasurma” come from?

salasurma (Finnish) comes from Finnish sala, from Proto-Finno-Ugric *sala, from Proto-Uralic śala — elm.

Ancestry of “salasurma”, step by step

salasurma traces back through two separate lines of ancestry.

via Finnish sala

StepLanguageWordMeaning
1FinnishsalaA secret
2Proto-Finno-Ugric*sala—
3Proto-Uralicśalaelm

via Finnish surma

StepLanguageWordMeaning
1FinnishsurmaA violent death, mainly used of humans;...
2Proto-Finnicsurmadeath
3Proto-Uralic*śurma—
Every word from Proto-Uralic śala →Every word from Proto-Finno-Ugric *sala →Every word from Finnish sala →