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

What won the World Cup was the invisible connection between the bodies that ultimately beat him.

— Bhaskar Chakravorti, Fortune, 25 July 2026
Ultimately, containers are supposed to behave almost like bits of data, moving across land and sea as if along invisible data lines.

— Alexander Klose, Scientific American, 24 July 2026

Definition of invisible

Adjective

This is a common leadership blind spot—especially among high performers—where admitting any vulnerability, or even pausing, feels indistinguishable from weakness.

— Julian Hayes II, Forbes.com, 25 July 2026
The novel’s lack of interest in what’s going on inside its characters’ phones becomes indistinguishable from a disinterest in what’s happening in their minds.

— Hillary Kelly, The Atlantic, 24 July 2026

Definition of indistinguishable

Adjective

An inaudible heartbeat reverberates through the space at a frequency below human hearing, producing vibrations that can be felt by those standing nearby.

— Michelle F. Solomon, Miami Herald, 21 July 2026
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

Definition of inaudible

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undesired

undetectable

undetected

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“Undetectable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undetectable. Accessed 2 Aug. 2026.

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Synonyms of undetectable

adjective

Example Sentences

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