adolescently

/ˌædəˈlɛsəntli/
adverb
  1. In a way that is typical of or characteristic of an adolescent; immaturely or with youthful energy.
    • He adolescently refused to apologize, even though he knew he was wrong.
    • She adolescently giggled at the silly joke during the serious meeting.
    • The two friends adolescently challenged each other to a video game duel.
Antonyms
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