whirring

whir  (hwûr, wûr)

v. whirred, whir·ring, whirs

v.intr.

To move so as to produce a vibrating or buzzing sound.

v.tr.

To cause to make a vibratory sound.

n.

1. A sound of buzzing or vibration: the whir of turning wheels.

2. Excited, noisy activity; bustle: the whir of busy shoppers.

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[Middle English whirren, probably of Scandinavian origin.]

Thesaurus

Noun	1.	whirring - sound of something in rapid motion; "whir of a bird's wings"; "the whir of the propellers" whir, whirr, birr sound - the sudden occurrence of an audible event; "the sound awakened them"
Adj.	1.	whirring - like the sound of rapidly vibrating wings noisy - full of or characterized by loud and nonmusical sounds; "a noisy cafeteria"; "a small noisy dog"