rejuvenate

verb

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"
4. get or give new life or energy; return to life, regain energy, recuperate"The week at the spa restored me"
5. become young again"The old man rejuvenated when he became a grandfather"