undetectable
adjective
un·de·tect·able
ˌən-di-ˈtek-tə-bəl 
-dē-
: unable to be detected : impossible to discover or notice : not detectable
an almost undetectable change
undetectable traces of poison
Signs of life may be so minimal as to be undetectable by modern instruments …—
Lauren J. Livo
Lauren J. LivoExamples of undetectable in a Sentence
Recent Examples on the Web
Odor repellents, usually sprays, contain ingredients that smell like sulfur to rabbits but are undetectable to humans.
—Mary Marlowe Leverette, Southern Living, 21 May 2025
The volcano is remote enough that even a strong eruption would be undetectable on land.
—Denise Chow, NBC news, 8 May 2025
Its soft brown tint is undetectable in hair, leaving no tell-tale light powder behind.
—Celia Shatzman, Forbes.com, 23 Apr. 2025
Crucially, Jones’s group figured out how to strip the nitrate from beet juice to create an undetectable placebo, and found that athletes improved their performance when given regular beet juice but not nitrate-free beet juice.
—Alex Hutchinson, Outside Online, 19 Apr. 2025
See All Example Sentences for undetectable
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.
Mary Marlowe Leverette, Southern Living, 21 May 2025
The volcano is remote enough that even a strong eruption would be undetectable on land.
—Denise Chow, NBC news, 8 May 2025
Its soft brown tint is undetectable in hair, leaving no tell-tale light powder behind.
—Celia Shatzman, Forbes.com, 23 Apr. 2025
Crucially, Jones’s group figured out how to strip the nitrate from beet juice to create an undetectable placebo, and found that athletes improved their performance when given regular beet juice but not nitrate-free beet juice.
—Alex Hutchinson, Outside Online, 19 Apr. 2025
See All Example Sentences for undetectable
Cite this Entry
“Undetectable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undetectable. Accessed 2 Jun. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share