Jolt, v. i. [imp. & p. p. Jolted; p. pr. & vb. n. Jolting.]
Etymology: [Prob. fr. jole, joll, jowl, and orig. 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.
2 other Webster entries under this spelling
Jolt, v. t.
To cause to shake with a sudden up and down motion, as in a carriage going over rough ground, or on a high-trotting horse; as, the horse jolts the rider; fast driving jolts the carriage and the passengers.
Jolt, n.
A sudden shock or jerk; a jolting motion, as in a carriage moving over rough ground. The first jolt had like to have shaken me out. Swift.
Shades of meaning
Fernald has no entry of its own for jolt; he lists it under shake.
He lists it without comment; the entries above explain its neighbors.