Where does “bulstr” come from?

bulstr (Old Norse) comes from Proto-Germanic bulstraz, from Proto-Indo-European bʰelǵʰ-, from Proto-Indo-European bʰel-, from Proto-Indo-European bʰōl-.

Ancestry of “bulstr”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	bulstraz	bolster, pillow, cushion
2	Proto-Indo-European	bʰelǵʰ-	to swell
3	Proto-Indo-European	bʰel-	to sound; to speak, roar, bark; shiny, white; to...
4	Proto-Indo-European	bʰōl-	—

Words derived from “bulstr”

bolster
bólstur
bólstraberg
bólstraský
bulster
bolster

Every word from Proto-Indo-European bʰōl- →

bulstr — Etymology, Origin & Word History | Etymology Explorer