judder

to make a series of small irregular or violent movements <the engine began to judder alarmingly just a few miles outside of Brighton> Synonyms agitate, bucket, convulse, jerk, jiggle, joggle, jolt, jounce, shake [chiefly British], quake, quiver, shudder, vibrate, wobble (also wabble)Related Words rock, sway, swing; chatter, quaver, shiver, thrill, tremble; twitch; dodder, waver; flicker, fluctuate, flutter, oscillate, undulate, wave; beat, palpitate, pit-a-pat, pitter-patter, pulsate, pulse, throb