~ 1
■ verb move in an energetic and busy manner.
↘[often as adjective bustling ] (of a place) be full of activity.
■ noun excited activity and movement.
Origin
ME: perh. a var. of obs. buskle , frequentative of busk 'prepare', from ON.
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~ 2
■ noun historical a pad or frame worn under a skirt to puff it out behind.
Origin
C18: of unknown origin.