To move or flutter with a whirring or rustling sound; to turn or roll in a state of agitation or confusion.
Possibly imitative or dialectal, with uncertain origins; may be related to 'flurry' but with an emphasis on the sound and motion rather than the frantic action.
This word exists in some regional dialects as an onomatopoeia for the sound of quick motion—imagine the noise leaves make when they swirl in the wind, and you have 'flurn,' a word that sounds like its meaning.
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