unreactive
adjective
un·re·ac·tive
ˌən-rē-ˈak-tiv 
: not tending to react : not reactive
pupils unreactive to light
chemically unreactive solvents
Examples of unreactive in a Sentence
Recent Examples on the Web
Before the treatment, pollen grains are more like marbles: hard, inert and largely unreactive.
—
Sandy Ong, JSTOR Daily, 11 Sep. 2025
They were thought of as chemically unreactive and generally harmless.
—Elizabeth Weise, USA Today, 13 May 2025
The intense, self-dramatizing Em and the unmoored but also unreactive and unironic Rohit are married but maybe not for much longer.
—Sara Holdren, Vulture, 27 Mar. 2024
And the mirrors of the JWST are gilded with gold, an element useful for its unreactive nature and ability to reflect infrared light (not to mention its popularity in jewelry).
—Sanjana Curtis, Scientific American, 12 Dec. 2022
In between is just a short, unreactive benzene ring.
—John Timmer, Ars Technica, 27 Apr. 2022
Surrounding this core is an intermediate unreactive layer, for example a zinc sulfide shell.
—Gabriel A. Silva, Forbes, 23 Sep. 2021
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Sandy Ong, JSTOR Daily, 11 Sep. 2025
They were thought of as chemically unreactive and generally harmless.
—Elizabeth Weise, USA Today, 13 May 2025
The intense, self-dramatizing Em and the unmoored but also unreactive and unironic Rohit are married but maybe not for much longer.
—Sara Holdren, Vulture, 27 Mar. 2024
And the mirrors of the JWST are gilded with gold, an element useful for its unreactive nature and ability to reflect infrared light (not to mention its popularity in jewelry).
—Sanjana Curtis, Scientific American, 12 Dec. 2022
In between is just a short, unreactive benzene ring.
—John Timmer, Ars Technica, 27 Apr. 2022
Surrounding this core is an intermediate unreactive layer, for example a zinc sulfide shell.
—Gabriel A. Silva, Forbes, 23 Sep. 2021
Cite this Entry
“Unreactive.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unreactive. Accessed 4 Nov. 2025.
Copy CitationMedical Definition
unreactive
adjective
un·re·ac·tive
-rē-ˈak-tiv
: not reactive
pupils unreactive to light
an unreactive gas
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