Where does “lux” come from?

lux (Portuguese) comes from Latin lūx, from Proto-Italic louks, from Proto-Indo-European lewḱ-, from Proto-Indo-European lewk- — bright; to shine; to see.

lux (Portuguese): lux the derived unit of illuminance

Definitions

  1. lux the derived unit of illuminance

Ancestry of “lux”, step by step

StepLanguageWordMeaning
1Latinlūxlight (of the sun, stars etc.)
2Proto-Italicloukslight
3Proto-Indo-Europeanlewḱ-lynx
4Proto-Indo-Europeanlewk-bright; to shine; to see
Every word from Proto-Indo-European lewk- →Every word from Proto-Indo-European lewḱ- →Every word from Proto-Italic louks →
lux — Etymology, Origin & Word History | Etymology Explorer