Source : Webster's Revised Unabridged Dictionary (1913)

Controvert \Con"tro*vert\, v. t. [imp. & p. p. {Controverted};
   p. pr. & vb. n. {Controverting}.] [See {Controversy}.]
   To make matter of controversy; to dispute or oppose by
   reasoning; to contend against in words or writings; to
   contest; to debate.

         Some controverted points had decided according to the
         sense of the best jurists.               --Macaulay.

Source : WordNet®

controvert
     v 1: be resistant to; "The board opposed his motion" [syn: {oppose},
           {contradict}]
     2: prove to be false or incorrect [syn: {refute}, {rebut}]