Rejuvenate

/rɪˈdʒuːvəneɪt/ verb medium

To make someone or something feel or look young, fresh, and full of energy again.

A short walk in the park at lunchtime always seems to rejuvenate her for the rest of the workday.

Memory Trick

Rejuvenate contains 'juvenile' (young) - to rejuvenate is to become young and fresh again.