juvenile

adjective

1 juvenile offenders:

young, teenage, teenaged, adolescent, junior, underage, pubescent, prepubescent.

▷antonyms adult.

2 his juvenile behaviour:

childish, immature, puerile, infantile, babyish;

jejune, inexperienced, callow, green, unsophisticated, naive, foolish, silly, stupid, asinine;

North American sophomoric;

informal wet behind the ears.

▷antonyms mature.

noun

cases of assault in which the victims are juveniles:

young person, youngster, child, teenager, adolescent, minor, junior;

boy, girl, schoolboy, schoolgirl;

informal kid.

▷antonyms adult.

word toolkit	juvenile
See youthful.

juvenile Oxford Dictionary of English