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a. Healthily plump and ample of figure: "A generation ago, fat babies were considered healthy and buxom actresses were popular, but society has since come to worship thinness" (Robert A. Hamilton).
2. Archaic Lively; vivacious.
3. Obsolete Obedient; yielding; pliant.
[Middle English, obedient, from Old English *būhsum, from būgan, to bend, submit; see bheug- in Indo-European roots.]