Source : Webster's Revised Unabridged Dictionary (1913)

Abnegate \Ab"ne*gate\, v. t. [imp. & p. p. {Abnegated}; p. pr. &
   vb. n. {Abnegating}.] [L. abnegatus,p. p. of abnegare; ab +
   negare to deny. See {Deny}.]
   To deny and reject; to abjure. --Sir E. Sandys. Farrar.

Source : WordNet®

abnegate
     v 1: deny oneself (something); restrain, especially from
          indulging in some pleasure; "She denied herself wine and
          spirits" [syn: {deny}]
     2: surrender; "The King abnegated his power to the ministers"
     3: deny or renounce; "They abnegated their gods"