Source : Webster's Revised Unabridged Dictionary (1913)

Renege \Re*nege"\ (r?-n?j" or r?-n?g"), v. t. [LL. renegare. See
   {Renegade}.]
   To deny; to disown. [Obs.] --Shak.

         All Europe high (all sorts of rights reneged) Against
         the truth and thee unholy leagued.       --Sylvester.

Renege \Re*nege"\, v. i.
   1. To deny. [Obs.] --Shak.

   2. (Card Playing) To revoke. [R.]

Source : WordNet®

renege
     n : the mistake of not following suit when able to do so [syn: {revoke}]

renege
     v : fail to fulfill a promise or obligation; "She backed out of
         her promise" [syn: {renege on}, {renegue on}, {go back on}]