\Youth"ful\, a.
1. Not yet mature or aged; young. ``Two youthful knights.''
   --Dryden. Also used figuratively. ``The youthful season of
   the year.'' --Shak.
2. Of or pertaining to the early part of life; suitable to
   early life; as, youthful days; youthful sports. ``Warm,
   youthful blood.'' --Shak. ``Youthful thoughts.'' --Milton.
3. Fresh; vigorous, as in youth.
         After millions of millions of ages . . . still
         youthful and flourishing.             --Bentley.
Syn: Puerile; juvenile.
Usage: {Youthful}, {Puerile}, {Juvenile}. Puerile is always
       used in a bad sense, or at least in the sense of what
       is suitable to a boy only; as, puerile objections,
       puerile amusements, etc. Juvenile is sometimes taken
       in a bad sense, as when speaking of youth in contrast
       with manhood; as, juvenile tricks; a juvenile
       performance. Youthful is commonly employed in a good
       sense; as, youthful aspirations; or at least by way of
       extenuating; as, youthful indiscretions. ``Some men,
       imagining themselves possessed with a divine fury,
       often fall into toys and trifles, which are only
       puerilities.'' --Dryden. ``Raw, juvenile writers
       imagine that, by pouring forth figures often, they
       render their compositions warm and animated.''
       --Blair. -- {Youth"ful*ly}, adv. -- {Youth"ful*ness},
       n.