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juvenile

/ˈd͡ʒuːvənaɪl/ noun

Latin root: iuvenīlis Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about juvenile at Wordnik → Where our words come from →

  1. A young person, not fully developed.

adjective

  1. Of or relating to or characteristic of or appropriate for children or young people.
    juvenile diabetes
  2. Displaying or suggesting a lack of maturity.
    adolescent insecurity

Origin

Borrowed from Latin iuvenīlis (“youthful; juvenile”), from iuvenis (“young; a youth”) + -īlis (suffix forming adjectives indicating a relationship or a pertaining to). Iuvenis is ultimately derived from Proto-Indo-European *h₂yuh₁en- (“young”), from *h₂óyu (“long life; lifetime”) (from *h₂ey- (“age; life”)) + *h₁én (“in”).

From Wiktionary, via Kaikki.org (CC BY-SA)