Where does “barrell” come from?

barrell (Middle English) comes from Old French baril, from Proto-Germanic barilaz, from Proto-Indo-European bʰēr- — shiny, light brown.

Ancestry of “barrell”, step by step

Step	Language	Word	Meaning
1	Old French	baril	small barrel
2	Proto-Germanic	barilaz	vessel for transport, container, jug; basket;...
3	Proto-Indo-European	bʰēr-	shiny, light brown

barrell — Etymology, Origin & Word History | Etymology Explorer