underactive
adjective
un·der·ac·tive
ˌən-dər-ˈak-tiv 
: characterized by an abnormally low level of activity
an underactive thyroid gland
Examples of underactive in a Sentence
Recent Examples on the Web
Interpreting Your Results Low or high TSH levels may indicate a thyroid disorder (overactive or underactive).
—
Brandi Jones, Msn-Ed, Rn-Bc, Health, 6 Dec. 2024
Thyroid Medication Thyroid medications like Synthroid (levothyroxine) and Armour Thyroid are used to treat underactive thyroid (hypothyroidism).
—Alex Yampolsky, Verywell Health, 28 Oct. 2024
Early psychiatric treatments were designed to send a big enough shock to the brain — whether with electricity, an intentional malaria infection, or coma-inducing drugs — to kickstart these supposedly underactive processes.
—Celia Ford, Vox, 7 Dec. 2018
Thyroid or pituitary gland conditions: Hyperthyroidism (overactive thyroid) and hypothyroidism (underactive thyroid) can affect the HPO axis and result in menstrual irregularities.
—Laura Schober, Health, 5 Oct. 2024
See all Example Sentences for underactive 
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Brandi Jones, Msn-Ed, Rn-Bc, Health, 6 Dec. 2024
Thyroid Medication Thyroid medications like Synthroid (levothyroxine) and Armour Thyroid are used to treat underactive thyroid (hypothyroidism).
—Alex Yampolsky, Verywell Health, 28 Oct. 2024
Early psychiatric treatments were designed to send a big enough shock to the brain — whether with electricity, an intentional malaria infection, or coma-inducing drugs — to kickstart these supposedly underactive processes.
—Celia Ford, Vox, 7 Dec. 2018
Thyroid or pituitary gland conditions: Hyperthyroidism (overactive thyroid) and hypothyroidism (underactive thyroid) can affect the HPO axis and result in menstrual irregularities.
—Laura Schober, Health, 5 Oct. 2024
See all Example Sentences for underactive
Dictionary Entries Near underactive
Cite this Entry
“Underactive.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underactive. Accessed 31 Dec. 2024.
Copy CitationKids Definition
underactive
adjective
un·der·ac·tive
ˌən-də-ˈrak-tiv
: having an abnormally low level of activity
an underactive gland
Medical Definition
underactive
adjective
un·der·ac·tive
-ˈak-tiv
: characterized by an abnormally low level of activity
an underactive thyroid gland
Love words? Need even more definitions?
Merriam-Webster unabridged
Share