jounce

verb

1. (ambitransitive)To jolt; to shake, especially by rough riding or by driving over obstructions.

   “So now, stimulated by some further experience with that world which does not care a tinker's damn whether a verb agrees with its subject in number and person or not, she permitted the taxicab to jounce her smile out of all semblance to anything calmly superior and into a very unschoolmarmish grin.”

   “She felt herself swooping, then she was lying on the bed beside Gowan, on her back, jouncing to the dying chatter of the shucks.”

   “The bed jounced when Mannie sat down on it where the medic had been sitting.”

noun

1. A movement, such as a jolt or a shake.

   “1966, Kathryn R. Schoonmaker vs. The State of New York, Claim No. 41795, State of New York Supreme Court, Appellate Division, Third Department Well, I remember we were bouncing around, the car was tilting back and forth, and it seems like it was bouncing after we made this big jounce and went up over the driveway, it was bouncing and tilting back and forth.”

   “When the drive axles have inner and outer joints, rear wheel camber change is minimized during wheel jounce and rebound.”

2. The fourth derivative of the position vector with respect to time; the time derivative of jerk.