Youthful

• POS: Adjective
• HYPHEN: youth=ful

CIDE DICTIONARY

Youthful, a. 

•  Not yet mature or aged; young.  Shak.  [1913 Webster]
•  Of or pertaining to the early part of life; suitable to early life; as, youthful days; youthful sports.  Milton.  [1913 Webster]
•  Fresh; vigorous, as in youth.  [1913 Webster]

  "After millions of millions of ages . . . still youthful and flourishing."  [1913 Webster]

Syn. -- Puerile; juvenile.

OXFORD DICTIONARY

Youthful, adj.
1 young, esp. in appearance or manner.
2 having the characteristics of youth (youthful impatience).
3 having the freshness or vigour of youth (a youthful complexion).

Derivative

youthfully adv. youthfulness n.

THESAURUS

Youthful

beardless, blooming, boyish, callow, florescent, flowering, flush, flushed, fresh, fresh as April, green, immature, infant, juvenal, juvenescent, juvenile, maiden, pink, puerile, rosy, rosy-cheeked, ruddy, unfledged, unripe, virgin, virginal, young, youngling, youthlike, youthy

ROGET THESAURUS

Youthful

Youth

N youth, juvenility, juvenescence, juniority, infancy, babyhood, childhood, boyhood, girlhood, youthhood, incunabula, minority, nonage, teens, tender age, bloom, cradle, nursery, leading strings, pupilage, puberty, pucelage, prime of life, flower of life, springtide of life, seedtime of life, golden season of life, heyday of youth, school days, rising generation, young, youthful, juvenile, green, callow, budding, sappy, puisne, beardless, under age, in one's teens, in statu pupillari, younger, junior, hebetic, unfledged, youth on the prow and pleasure at the helm, youth a the glad season of life.