youthful

adjective

youth·​ful ˈyüth-fəl 

1

: of, relating to, or characteristic of youth

youthful inexperience

2

: being young and not yet mature

3

: marked by or possessing youth

youthful dancers

4

: having the vitality or freshness of youth : vigorous

my youthful grandparents

5

: having accomplished or undergone little erosion

youthful mountains

youthfully

ˈyüth-fə-lē 

adverb

youthfulness noun

Synonyms

• adolescent
• immature
• juvenile
• young
• youngish

Examples of youthful in a Sentence

My grandparents are still very youthful.

it's still a youthful nation with a lot of promise and potential

Recent Examples on the Web

Audiences witness the characters’ lives unfold backward, from their fractured adult friendships to their youthful optimism. —Greg Evans, Deadline, 1 Apr. 2025

But behind the image of youthful confidence lies a question increasingly whispered by allies and adversaries alike: Can Bardella, who has no experience in government, really lead? —Thomas Adamson, Los Angeles Times, 1 Apr. 2025

Lewis was well suited for the cold playing Henry, who had lost his youthful athletic frame. —Bryan Alexander, USA Today, 30 Mar. 2025

In 1967, the youthful pitching staff was plagued by injuries. —Raymond Daniel Burke, Baltimore Sun, 29 Mar. 2025

Word History

First Known Use

1557, in the meaning defined at sense 1

Phrases Containing youthful

• youthful indiscretion

Rhymes for youthful

• untruthful
• truthful

Kids Definition

youthful

adjective

youth·​ful ˈyüth-fəl 

1

: of, relating to, or suitable for youth

2

: being young and not yet mature

3

: having the freshness and energy of youth

youthful grandparents

youthfully

-fə-lē 

adverb

youthfulness noun