Source : Webster's Revised Unabridged Dictionary (1913)

Jaunce \Jaunce\, v. i. [OF. jancer. Cf. {Jounce}, {Jaunt}.]
   To ride hard; to jounce. [Obs.]

         Spurr'd, galled and tired by jauncing Bolingbroke.
                                                  --Shak.