Where does “fulgmen” come from?

fulgmen (Latin) comes from Latin fulgeo, from Proto-Indo-European bʰel-, from Proto-Indo-European bʰōl-.

Ancestry of “fulgmen”, step by step

Step	Language	Word	Meaning
1	Latin	fulgeo	I flash, lighten, glitter, gleam, glare, glisten,...
2	Proto-Indo-European	bʰel-	to sound; to speak, roar, bark; shiny, white; to...
3	Proto-Indo-European	bʰōl-	—

fulgmen — Etymology, Origin & Word History | Etymology Explorer