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
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The drugs are undetectable, a fact that threatens to destroy competitive sports forever. Barry Levitt, Time, 20 June 2025 Wissel went on to explain that the radio waves should have been undetectable. Nick Butler, FOXNews.com, 14 June 2025 The latest and greatest formulas are more undetectable than ever, no matter their hold level, and work across all hair types. Michelle Rostamian, Allure, 6 June 2025 People who use antiretroviral medications can reduce the viral load of HIV in the body to undetectable levels, which can stop them from passing it to others. Melissa Fleur Afshar, MSNBC Newsweek, 5 June 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 30 Jun. 2025.

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