whirr

[hwur, wur] /ʰwɜr, wɜr/
verb (used without object), verb (used with object), noun
1.
whir.
Examples from the web for whirr
  • Pull the trigger, and it kicks in with the satisfying whirr of a small jet engine.
  • The server racks are nearly silent, and their internal fans whirr almost imperceptibly.
  • And the whirr and jangle of myriad horns only added to his confusion.
British Dictionary definitions for whirr

whir

/wɜː/
noun
1.
a prolonged soft swish or buzz, as of a motor working or wings flapping
2.
a bustle or rush
verb whirs, whirrs, whirring, whirred
3.
to make or cause to make a whir
Word Origin
C14: probably from Scandinavian; compare Norwegian kvirra, Danish hvirre; see whirl