To move with a whispering or rustling sound; to bustle or move busily around.
Variant or dialectal form related to 'bustle', possibly influenced by 'bristle'—the exact etymology is unclear, but it likely combines elements of both words to describe quick, noisy movement.
This word seems to be an older or regional variant that mixes 'bustle' and 'rustle'—these kinds of blended or dialectal words often disappear as standard spelling becomes more universal!
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