Where does “fuscare” come from?

fuscare (Latin) comes from Latin Fuscus, from Latin fuscus, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

Ancestry of “fuscare”, step by step

Step	Language	Word	Meaning
1	Latin	Fuscus	—
2	Latin	fuscus	dark, dim, dimly lit; black, brown; husky, hoarse
3	Proto-Indo-European	dʰewh₂-	smoke; mist, haze

fuscare — Etymology, Origin & Word History | Etymology Explorer