judder

ˈdʒʌdə/

BRITISH

verb

1. 1.

   (especially of something mechanical) shake and vibrate rapidly and with force.

   "the steering wheel juddered in his hand"

noun

1. 1.

   an instance of rapid and forceful shaking and vibration.

   "the car gave a judder"

this seems like a very useful word. Why didn't I know it until today?