Where does “iskujousi” come from?

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

iskujousi (Finnish): hammer spring, mainspring

Definitions

  1. hammer spring, mainspring

Ancestry of “iskujousi”, step by step

iskujousi 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 jousi

StepLanguageWordMeaning
1Finnishjousibow; spring; musical bow
2Finnishjoutsi—
Every word from Proto-Finnic -u →Every word from Finnish -u →Every word from Finnish isku →