Where does “sombrement” come from?

sombrement (French) comes from French sombre, from Old French sombre, 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-.

sombrement (French): darkly; somberly

Definitions

darkly; somberly

Ancestry of “sombrement”, step by step

Step	Language	Word	Meaning
1	French	sombre	dark; first-person singular present indicative of...
2	Old French	sombre	—
3	Old French	sombrer	—
4	Vulgar Latin	subumbrare	to shadow
5	Latin	sub	under, beneath; behind; at the feet of
6	Proto-Italic	supo	under
7	Proto-Indo-European	upó	under, below
8	Proto-Indo-European	h₃ewp-	—

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