Where does “fulmino” come from?

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

Ancestry of “fulmino”, step by step

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

fulmino — Etymology, Origin & Word History | Etymology Explorer