Where does “sombre” come from?

sombre (Old French) comes from Old French sombrer, from Vulgar Latin subumbrare, from Latin sub, from Proto-Italic supo, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.

Ancestry of “sombre”, step by step

StepLanguageWordMeaning
1Old Frenchsombrer—
2Vulgar Latinsubumbrareto shadow
3Latinsubunder, beneath; behind; at the feet of
4Proto-Italicsupounder
5Proto-Indo-Europeanupóunder, below
6Proto-Indo-Europeanh₃ewp-—

Words derived from “sombre”

Every word from Proto-Indo-European h₃ewp- →Every word from Proto-Indo-European upó →Every word from Proto-Italic supo →