whirring whirring /ˈhwɝːɪŋ/

adjective

1. Like the sound of rapidly vibrating wings  ( whirring )
   like the sound of rapidly vibrating wings
   

noun

1. () Sound of something in rapid motion  ( birr , whirr , whir , whirring )
   sound of something in rapid motion
    Whir of a bird's wings
   whir of a bird's wings
    The whir of the propellers
   the whir of the propellers
   

 whir whir /wɜːr/

noun

1. () Sound of something in rapid motion  ( birr , whirr , whir , whirring )
   sound of something in rapid motion
    Whir of a bird's wings
   whir of a bird's wings
    The whir of the propellers
   the whir of the propellers
   

verb

1. () Make a soft swishing sound  ( birr , purr , whirr , whir , whiz , whizz )
   make a soft swishing sound
    The motor whirred
   the motor whirred
    The car engine purred
   the car engine purred