Where does “fluō” come from?

fluō (Latin) comes from Proto-Indo-European bʰléh₁-, from Proto-Indo-European bʰel-, from Proto-Indo-European bʰōl-.

Ancestry of “fluō”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	bʰléh₁-	—
2	Proto-Indo-European	bʰel-	to sound; to speak, roar, bark; shiny, white; to...
3	Proto-Indo-European	bʰōl-	—

fluō — Etymology, Origin & Word History | Etymology Explorer