undetectable

adjective

un·​de·​tect·​able ˌən-di-ˈtek-tə-bəl How to pronounce undetectable (audio)
-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
undetectably adverb
an undetectably small change

Examples of undetectable in a Sentence

Recent Examples on the Web
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.
Their flavor is almost undetectable when blended with other ingredients. Chelsea Rae Bourgeois, Health, 20 Aug. 2025 Its back and seat have a stunning woven pattern made from durable rattan, while its sturdy aluminum frame has an undetectable woodgrain finish. Clara McMahon, People.com, 6 Aug. 2025 The panel did not address the safety of SSRIs following delivery, but numerous studies show that taking SSRI antidepressants while breastfeeding is low risk, usually producing low to undetectable drug levels in infants. Andrew Novick, The Conversation, 31 July 2025 Another man with undetectable HIV was unable to access his medication for days. Nicole Widdersheim, The Orlando Sentinel, 29 July 2025 See All Example Sentences for undetectable

Word History

First Known Use

1863, in the meaning defined above

Time Traveler
The first known use of undetectable was in 1863

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Cite this Entry

“Undetectable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undetectable. Accessed 31 Aug. 2025.

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