'byed 'dzum

to refine/ train/ develop [RB]

ft. of 'byong ba; 'byong ba, 'byongs pa, 'byong ba intr. v.; to refine/ train/ develop; to be cleansed [RY]

deal competently with, cleanse, purify, skilled, well-versed, full of perfection, to gain mastery over [JV]

1) [be] cleansed; 2) [be] adept/ skilled/ accomplished/ learned; 3) purge [IW]