UNDETECTABLE Synonyms: 48 Similar and Opposite Words

undetectable

adjective

Definition of undetectable

as in imperceptible

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Example Sentences

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.

Recent Examples of undetectable Patented techniques exist that alter a film's audio track just enough to be undetectable to a paying audience but detectable, and degraded, on a bootlegged copy. — Damion Taylor, Forbes.com, 7 July 2026 Thanks to his medication, doctors have confirmed to him that the virus has reached undetectable levels in his body. — Luke Chinman, PEOPLE, 29 June 2026 Tager explained that the process involved mending the canvas, then treating the layers of paint to ensure that the damage was undetectable. — News Desk, Artforum, 9 June 2026 As a result, drinking fountains that averaged over 58 parts per billion were lowered to undetectable levels of lead. — Christiana Freitag, Chicago Tribune, 8 June 2026 See All Example Sentences for undetectable

Recent Examples of Synonyms for undetectable

Adjective

The contact was imperceptible to the naked eye, but a space-age sensor in the ball had confirmed it.

— Los Angeles Times, Los Angeles Times, 12 July 2026
The tool, developed by independent AI engineer Luke Geel, analyzes past results and players’ activity—from posture to blink rate—spotting connections that might be imperceptible to the average viewer but visible to top pros.

— Jacob Feldman, Sportico.com, 3 July 2026

Definition of imperceptible

Adjective

In his work, Hujar returned again and again to the spiritual life of his sitters—an invisible presence in his images.

— Hilton Als, New Yorker, 17 July 2026
His arms are outstretched and his shirt, worn like a jacket over a T-shirt, billows behind him as if blown by an invisible wind.

— Lisa Gutierrez, Kansas City Star, 17 July 2026

Definition of invisible

Adjective

The machines got better at the performance of attention, and for a person starved of attention, that performance is indistinguishable from love.

— Jason Snyder, Forbes.com, 17 July 2026
Visually, the Touring is mostly indistinguishable from the more expensive Grand Touring, which is fortunate because its design is one of the vehicle’s strongest assets.

— ArsTechnica, ArsTechnica, 17 July 2026

Definition of indistinguishable

Adjective

The audio of the sports stars’ heated conversation is largely inaudible, so Paul hopped online to offer his side of the story.

— Angelique Jackson, Variety, 18 July 2026
If these systems are ever brought to market, the characteristic sound of an espresso machine could be replaced by the inaudible vibrations of ultrasound.

— Javier Carbajal, Wired News, 20 June 2026

Definition of inaudible

Browse Nearby Words

undesired

undetectable

undetected

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Style

“Undetectable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undetectable. Accessed 25 Jul. 2026.

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Synonyms of undetectable

adjective

Example Sentences

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