underactive

English

Etymology

From under- +‎ active.

Pronunciation

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• Rhymes: -æktɪv

Adjective

underactive (comparative more underactive, superlative most underactive)

1. Less than normally active.
   • 1989 Apr, John A. McDougall, “Healthy by Choice”, in Vegetarian Times‎:

     Thus a person with an underactive thyroid can gain weight even on a low-calorie diet.

Synonyms

• hypoactive

Antonyms

• overactive