What is another word for underactive?
Pronunciation: [ˌʌndəɹˈaktɪv] (IPA) 
Underactive means functioning at a lower level than usual or expected. It is often used to describe medical conditions such as an underactive thyroid gland or an underactive immune system. Some synonyms for this word include slow, sluggish, inactive, lethargic, and deficient. Other synonyms include weak, feeble, impotent, ineffectual, and powerless. In some cases, underactive can also be replaced with terms such as deficient, inadequate, subnormal or insufficient. Understanding the synonyms of underactive can help individuals better communicate their symptoms or conditions to healthcare providers and receive effective treatment.
