Where does “ljusknapp” come from?

ljusknapp (Swedish) comes from Swedish ljus, from Old Swedish liūs, from Old Norse ljós, from Proto-Germanic leuhsą, from Proto-Indo-European lewk-so-m, from Proto-Indo-European lewḱ-, from Proto-Indo-European lewk- — bright; to shine; to see.

ljusknapp (Swedish): a light switch

Definitions

  1. a light switch

Ancestry of “ljusknapp”, step by step

ljusknapp traces back through two separate lines of ancestry.

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

via Swedish knapp

StepLanguageWordMeaning
1Swedishknappscarce, not much of something; somewhat less...
2Old Norseknapprknob
3Proto-Germanicknappôknob, lump; button
4Proto-Indo-Europeangnebʰ-to press, tighten
5Proto-Indo-Europeangen-to squeeze, pinch, kink, ball up, concentrate; to...
Every word from Proto-Indo-European lewk-Every word from Proto-Indo-European lewḱ-Every word from Proto-Indo-European lewk-so-m