Where does “salamanisku” come from?

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

salamanisku (Finnish): lightning strike

Definitions

  1. lightning strike

Ancestry of “salamanisku”, step by step

salamanisku 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 Salama

StepLanguageWordMeaning
1FinnishSalamalightning, bolt
2Proto-Finnicsalamalightning
3Proto-Uralicśalaelm
Every word from Proto-Finnic -u →Every word from Finnish -u →Every word from Finnish isku →