youthful
Definitions
Remaining fresh, vigorous, or active in a manner characteristic of young people.
Relating to, appropriate for, or typical of early life or adolescence.
Examples
Despite his age, he maintained a youthful energy that inspired everyone around him.
The garden was filled with a youthful vibrancy as the spring flowers began to bloom.
She wore a bright, colorful dress that gave her a youthful appearance.