Where does “flāō” come from?

flāō (Proto-Italic) comes from Proto-Indo-European bʰleh₁-, from Proto-Indo-European bʰel-, from Proto-Indo-European bʰōl-.

Ancestry of “flāō”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	bʰleh₁-	to bleat; to cry; to blow
2	Proto-Indo-European	bʰel-	to sound; to speak, roar, bark; shiny, white; to...
3	Proto-Indo-European	bʰōl-	—

flāō — Etymology, Origin & Word History | Etymology Explorer