Where does “barĵíš” come from?

barĵíš (Proto-Iranian) comes from Proto-Indo-Iranian bʰarȷ́ʰíš, from Proto-Indo-European bʰelǵʰ-, from Proto-Indo-European bʰel-, from Proto-Indo-European bʰōl-.

Ancestry of “barĵíš”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-Iranian	bʰarȷ́ʰíš	pillow; bed or layer of grass
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-	—

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