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 At the time, a representative for Botanic Tonics, the company behind Feel Free, told USA TODAY its Feel Free Classic tonic contains only natural leaf kratom, with nearly undetectable levels of 7-OH. — Charles Trepany, USA Today, 21 Aug. 2026 This subtle watermark, undetectable to human readers, alters word patterns and persists through minor edits, with a detection API forthcoming. — Christopher Rim, Forbes.com, 21 Aug. 2026 That means even a clump large enough to play the role of a gravitational lens would be undetectable. — Robert Lea, Space.com, 19 Aug. 2026 Today, Prum takes medication to keep her HIV to undetectable levels in her body, preventing health complications. — Durrie Bouscaren, NPR, 6 Aug. 2026 See All Example Sentences for undetectable

Recent Examples of Synonyms for undetectable

Adjective

Through a meditative duet between the performer’s cognition and their autonomic nervous system, activities that were largely imperceptible to an outside observer became known to the performer.

— Sophie Landres, Artforum, 1 Oct. 2026
Meta offers a virtually imperceptible edge in sharpness—37 pixels per degree compared with Apple's 34—but Apple's broader view and sheer pixel count give it the clear win.

— Will Greenwald, PC Magazine, 30 Sep. 2026

Definition of imperceptible

Adjective

Unlike a conventional tattoo, whose visible design generally remains until the pigment is removed or altered, PhotoTat lets users switch their tattoos between coloured and nearly invisible states.

— Rupendra Brahambhatt, Interesting Engineering, 10 Oct. 2026
Yet as midterm elections draw near, the movement is nearly invisible on the campaign trail and struggling to find a financial or messaging foothold in key races.

— Isabella Cueto, STAT, 9 Oct. 2026

Definition of invisible

Adjective

Had Thursday gone differently, the present and future may have been indistinguishable.

— Brian Hamilton, New York Times, 2 Oct. 2026
Thus the Marlowe played by Mitchum in the 1978 remake of The Big Sleep seems like an entirely different person from the original played by Bogart in 1946, despite their almost indistinguishable stories.

— Harmon Siegel, Artforum, 1 Oct. 2026

Definition of indistinguishable

Adjective

Compared to the roaring thunder of a modern data center, this cluster is nearly inaudible.

— ArsTechnica, ArsTechnica, 9 Oct. 2026
Moments after McBride complained to Seeman about the play, sideline cameras showed Seeman mouthing inaudible words, appearing to be expletives, to McBride, who seemed surprised by Seeman’s conduct.

— Angel Saunders, PEOPLE, 6 Oct. 2026

Definition of inaudible

Adjective

Okay, Noah is somehow a Manhunter, though how this came to be is left vague and almost intangible for much of the episode.

— Siddhant Adlakha, Vulture, 5 Oct. 2026
In early 2019, Philadelphia was one of six brands the company wrote down as the value of its intangible assets fell.

— Amelia Lucas, CNBC, 15 Sep. 2026

Definition of intangible

Browse Nearby Words

undesired

undetectable

undetected

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“Undetectable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undetectable. Accessed 11 Oct. 2026.

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Synonyms of undetectable

adjective

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