whirring

Noun
  1. Sound of something in rapid motion (synset 107414517)
    "whir of a bird's wings"; "the whir of the propellers"
    is a type of: sound - the sudden occurrence of an audible event
    same as: birr, whir, whirr
Adjective
  1. Like the sound of rapidly vibrating wings (synset 301928530)
    similar to: noisy - full of or characterized by loud and nonmusical sounds

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