Source : Webster's Revised Unabridged Dictionary (1913)

Revitalize \Re*vi"tal*ize\, v. t.
   To restore vitality to; to bring back to life. --L. S. Beale.

Source : WordNet®

revitalize
     v 1: restore strength; "This food revitalized the patient" [syn:
          {regenerate}]
     2: give new life or vigor to [syn: {revitalise}]