Where does “surmanisku” come from?

surmanisku (Finnish) comes from Finnish isku, from Finnish -u, from Proto-Finnic -u — Forms nouns from adjectives, nouns.

surmanisku (Finnish): deathblow, coup de grace

Definitions

  1. deathblow, coup de grace

Ancestry of “surmanisku”, step by step

surmanisku traces back through two separate lines of ancestry.

via Finnish isku

StepLanguageWordMeaning
1Finnishiskuhit, blow; impact; attentat, attack, strike, raid
2Finnish-uForms nouns from verbs. Most common with "e"- and...
3Proto-Finnic-uForms nouns from adjectives, nouns

via Finnish surma

StepLanguageWordMeaning
1FinnishsurmaA violent death, mainly used of humans;...
2Proto-Finnicsurmadeath
3Proto-Uralic*śurma—
Every word from Proto-Finnic -u →Every word from Finnish -u →Every word from Finnish isku →