Where does “blatho” come from?

blatho (Norn) comes from Old Irish bláthach, from Old Irish bláth, from Proto-Celtic blātus, from Proto-Indo-European bʰleh₃-, from Proto-Indo-European bʰel-, from Proto-Indo-European bʰōl-.

blatho (Norn): buttermilk

Definitions

buttermilk

Ancestry of “blatho”, step by step

Step	Language	Word	Meaning
1	Old Irish	bláthach	buttermilk
2	Old Irish	bláth	flower; blossom; bloom
3	Proto-Celtic	blātus	flower
4	Proto-Indo-European	bʰleh₃-	bloom, flower
5	Proto-Indo-European	bʰel-	to sound; to speak, roar, bark; shiny, white; to...
6	Proto-Indo-European	bʰōl-	—

Every word from Proto-Indo-European bʰōl- →Every word from Proto-Indo-European bʰel- →Every word from Proto-Indo-European bʰleh₃- →