Where does “fastslå” come from?

fastslå (Norwegian Bokmål) comes from Norwegian Bokmål slå, from Old Norse slá, from Proto-Germanic slahaną, from Proto-Indo-European slak- — to hit; strike; to hit, strike, throw; to hit,...

fastslå (Norwegian Bokmål): to establish, ascertain, prove

Definitions

  1. to establish, ascertain, prove

Ancestry of “fastslå”, step by step

fastslå traces back through two separate lines of ancestry.

via Norwegian Bokmål slå

StepLanguageWordMeaning
1Norwegian Bokmålslåto beat, punch, hit, strike; to tack; slå sammen...
2Old Norsesláto hit, beat, strike; to strike, pluck
3Proto-Germanicslahanąto hit, to strike; to kill
4Proto-Indo-Europeanslak-to hit; strike; to hit, strike, throw; to hit,...

via Norwegian Bokmål fast

StepLanguageWordMeaning
1Norwegian Bokmålfastsolid, steady, firm, fixed, permanent; imperative...
2Old Norsefastrfast, firm, sticking fast to the spot; close,...
3Proto-Germanicfastuzfixed, firm, secure
Every word from Proto-Indo-European slak- →Every word from Proto-Germanic slahaną →Every word from Old Norse slá →