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 of youthful

• young

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

This time, however, Kubo may have the right mix of youthful energy and experience to help push his country further into contention. —Rohan Nadkarni, NBC news, 12 May 2026

Portobello Bookshop is a small, youthful indie that programs the best events with the biggest names. —Riza Cruz, Vogue, 11 May 2026

Much like their youthful, emotional heartbeats, malls in the ’80s and ’90s bustled, becoming as quintessential to American culture as hot dogs and apple pie. —Audrey Pachuta, Chicago Tribune, 9 May 2026

Maybe this is where youthful enthusiasm and a short memory – and some desperation – kick in. —Jim Alexander, Oc Register, 9 May 2026

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