Of or characteristic of a child, especially in immaturity

• juvenile

  1. Not fully grown or developed; young.
  2. Of or characteristic of a young animal that has not reached sexual maturity:
  3. Characteristic of, intended for, or appropriate for children or young people:

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• infantile

  1. Of or relating to infants or infancy.
  2. Displaying or suggesting a lack of maturity; childish:

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• immature

  1. Not fully grown or developed:
  2. Marked by or suggesting a lack of normal maturity:
  3. An immature animal; a juvenile.

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• childish

  1. Of, relating to, or suitable for a child or childhood:
  2. Marked by or indicating a lack of maturity; puerile:

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• babyish

  1. Like a baby; childish; puerile; simple.

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