Where does “blåljus” come from?

blåljus (Swedish) comes from Swedish blå, from Swedish trä, from Old Norse tré, from Proto-Germanic trewą, from English doru, from Ancient Greek δόρυ, from Proto-Hellenic dóru, from Proto-Indo-European dóru — hard, firm, strong, solid; hard, fast; tree.

blåljus (Swedish): emergency vehicle lighting

Definitions

  1. emergency vehicle lighting

Ancestry of “blåljus”, step by step

blåljus traces back through two separate lines of ancestry.

via Swedish blå

StepLanguageWordMeaning
1Swedishblåblue; of or pertaining to conservatives or...
2Swedishträwood; a tree; Short for slagträ
3Old Norsetrétree; the mast of a ship; ree, rafter, beam
4Proto-Germanictrewątree
5EnglishdoruAlternative form of dory
6Ancient Greekδόρυwood, tree, stem; spear shaft, spear, lance,...
7Proto-Hellenicdórutree
8Proto-Indo-Europeandórutree
9Proto-Indo-Europeandrew-hard, firm, strong, solid; hard, fast; tree

via Swedish ljus

StepLanguageWordMeaning
1Swedishljusof light or color: bright; of sound;...
2Old Swedishliūslight, bright
3Old Norseljósa burning light; light of the sun
4Proto-Germanicleuhsąlight
5Proto-Indo-Europeanlewk-so-m
6Proto-Indo-Europeanlewḱ-lynx
7Proto-Indo-Europeanlewk-bright; to shine; to see

Words derived from “blåljus

Every word from Proto-Indo-European drew-Every word from Proto-Indo-European dóruEvery word from Proto-Hellenic dóru