资料来源 : Webster's Revised Unabridged Dictionary (1913)

Jounce \Jounce\, v. t. & i. [imp. & p. p. {Jounced}; p. pr. &
   vb. n. {Jouncing}.] [Cf. {Jaunce}.]
   To jolt; to shake, especially by rough riding or by driving
   over obstructions.