JOUNCE
jolt, jar, jounce, shock
(noun) a sudden jarring impact; “the door closed with a jolt”; “all the jars and jolts were smoothed out by the shock absorbers”
bounce, jounce
(verb) move up and down repeatedly
Source: WordNet® 3.1
Etymology
Verb
jounce (third-person singular simple present jounces, present participle jouncing, simple past and past participle jounced)
(ambitransitive) To jolt; to shake, especially by rough riding or by driving over obstructions.
Noun
jounce (countable and uncountable, plural jounces)
(physics) The fourth derivative of the position vector with respect to time; the time derivative of jerk.
Source: Wiktionary
Jounce, v. t. & i. [imp. & p. p. Jounced; p. pr. & vb. n. Jouncing.]
Etym: [Cf. Jaunce.]
Definition: To jolt; to shake, especially by rough riding or by driving
over obstructions.
Jounce, n.
Definition: A jolt; a shake; a hard trot.
Source: Webster’s Unabridged Dictionary 1913 Edition