Source : Webster's Revised Unabridged Dictionary (1913)

Sprunt \Sprunt\, v. i. [Cf. {Sprout}, v. i.]
   To spring up; to germinate; to spring forward or outward.
   [Obs.]

   {To sprunt up}, to draw one's self up suddenly, as in anger
      or defiance; to bristle up. [Local, U.S.]