English

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Etymology

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under- +‎ active

Pronunciation

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Adjective

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underactive (comparative more underactive, superlative most underactive)

  1. Less than normally active.
    • 1989 Apr, John A. McDougall, “Healthy by Choice”, in Vegetarian Times[1]:
      Thus a person with an underactive thyroid can gain weight even on a low-calorie diet.

Synonyms

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Antonyms

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