underactive

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underactive

Rhymes with -æktɪv

Where it comes from

From under- + active.

adjective more underactive · most underactive

Less than normally active. Thus a person with an underactive thyroid can gain weight even on a low-calorie diet.
Similar: hypoactive

Opposite: overactive

Thesaurus

adjective

Opposite: overactive

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MLA

"underactive." Wiktionary, via Micwyn, micwyn.com/word/underactive. Accessed 6 Nov. 2026.

APA

underactive. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/underactive

Chicago

"underactive." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/underactive.

BibTeX

@misc{underactive_2026,
  title = {underactive},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/underactive},
  urldate = {2026-11-06}
}