adolescent

/ˌædəˈlɛsənt/
adjective
  1. Relating to or characteristic of adolescence or adolescents.
    • She went through an adolescent phase of dyeing her hair bright colors.
    • The book explores the adolescent experience of first love and friendship.
    • Adolescent behavior can sometimes be unpredictable and moody.
  2. Immature or not fully developed; behaving in a childish or naive way.
    • She dismissed his argument as adolescent and unprofessional.
    • The company's response to the crisis was surprisingly adolescent.
    • His adolescent sense of humor often annoyed his older coworkers.
Antonyms
noun
  1. A young person who is in the period of adolescence; a teenager.
    • The program is designed to help adolescents develop healthy habits.
    • Many adolescents feel pressure to fit in with their peers.
    • The school counselor works with adolescents who are struggling with stress.
Antonyms
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