JOLT

jolt. Jolt, n. a violent shock; v.t. to shake very much

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Jolt (jōlt), v. i. [imp. & p. p. Jolted; p. pr. & vb. n. Jolting.] [[Prob. fr. jole, joll, jowl, and originally meaning, to knock on the head. See Jowl.]] To shake with short, abrupt risings and fallings, as a carriage moving on rough ground; as, the coach jolts.