rejuvenate

rejuvenate
    v 1: cause (a stream or river) to erode, as by an uplift of the
         land
    2: develop youthful topographical features; "the land
       rejuvenated"
    3: make younger or more youthful; "The contact with his
       grandchildren rejuvenated him" [ant: {age}]
    4: return to life; get or give new life or energy; "The week at
       the spa restored me" [syn: {regenerate}, {restore},
       {rejuvenate}]
    5: become young again; "The old man rejuvenated when he became a
       grandfather"
    

Rejuvenate \Re*ju"ve*nate\ (r?-j?"v?-n?t), v. t. [Pref. re- re-
   + L. juventis young, youthful.]
   To render young again.
   [1913 Webster]
    

36 Moby Thesaurus words for "rejuvenate":
      bring back, bring to, call back, modernize, reanimate,
      recall to life, recharge, reclaim, recondition, reconstruct,
      recover, recruit, refresh, refurbish, regenerate, rehabilitate,
      reheat the ashes, reinspire, reinvigorate, rekindle, relight,
      renew, renovate, restitute, restore, resurrect, resuscitate,
      revitalize, revive, revivify, rewarm, stir the embers, update,
      warm over, warm up, youthen