Immaturely

//ɪməˈtjʊə(ɹ)li// adv

Definitions

Adverb
  1. 1
    Giving an appearance of immaturity; childishly.

    "They may be approaching 40, but after three beers they are behaving as immaturely as any teenager."

  2. 2
    Without having attained maturity.

    "[…] birds which are hatched immaturely and fly immediately after leaving the nest."

Adverb
  1. 1
    in an immature manner wordnet

Etymology

From immature + -ly.

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