Where does “-բար” come from?

-բար (Old Armenian) comes from Old Armenian բարք, from Proto-Indo-European bʰēr- — shiny, light brown.

-բար (Old Armenian): Forming adverbs. Corresponds to -ly

Definitions

Step	Language	Word	Meaning
1	Old Armenian	բարք	manners, morals, custom, disposition,...
2	Proto-Indo-European	bʰēr-	shiny, light brown

-բար — Etymology, Origin & Word History | Etymology Explorer