as in invisible
not perceptible by a sense or by the mind
a slight difference in hue between the two glasses that's imperceptible unless they're placed side by side
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Recent Examples of imperceptible
To a casual viewer, the manipulation might have been imperceptible.
—
Stuart A. Thompson, New York Times, 14 Aug. 2024
The scientists note their attacks could make deep learning systems misclassify images up to 100 percent of the time, and that modified images were imperceptible from real ones to the human eye.
—IEEE Spectrum, 4 June 2018
These are variations that might be imperceptible to the casual sushi eater but which can send a connoisseur into raptures.
—Helen Rosner, The New Yorker, 27 Oct. 2024
These marks are imperceptible to the naked eye but can be detected with digital scanning equipment, including smartphones and machine vision cameras, providing a critical layer of authentication that is widely accessible and cost-effective.
—Judy Moon, Forbes, 8 Oct. 2024
See all Example Sentences for imperceptible 
Stuart A. Thompson, New York Times, 14 Aug. 2024
The scientists note their attacks could make deep learning systems misclassify images up to 100 percent of the time, and that modified images were imperceptible from real ones to the human eye.
—IEEE Spectrum, 4 June 2018
These are variations that might be imperceptible to the casual sushi eater but which can send a connoisseur into raptures.
—Helen Rosner, The New Yorker, 27 Oct. 2024
These marks are imperceptible to the naked eye but can be detected with digital scanning equipment, including smartphones and machine vision cameras, providing a critical layer of authentication that is widely accessible and cost-effective.
—Judy Moon, Forbes, 8 Oct. 2024
See all Example Sentences for imperceptible
Recent Examples of Synonyms for imperceptible
Adjective
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You’re left with skin that feels comfortable, purified, and protected, as if wrapped in an invisible shield against daily environmental damage.—
Christa Joanna Lee,
Allure,
19 Jan. 2025
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The show literally does have invisible people watching the characters, who the characters aren’t aware of.—
Ethan Shanfeld,
Variety,
17 Jan. 2025
Adjective
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Our favorite twist on the classic caramel corn recipe is to add espresso powder for a subtle coffee flavor.—
Sarah Martens,
Better Homes & Gardens,
13 Jan. 2025
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Cacio e pepe, with its Parmesan and black pepper, is more subtle.—
Lauryn Azu,
Chicago Tribune,
13 Jan. 2025
Adjective
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Colossal plans to recreate these creatures by editing the genome of the extinct animal’s closest living relative to make a hybrid animal that would be visually indistinguishable from its extinct forerunner.—
Katie Hunt,
CNN,
16 Jan. 2025
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That puts a heavy burden on sound designers P.K. Hooker and Will Files, whose intrusive mix of creepy noises is often indistinguishable from Benjamin Wallfisch’s discordant score.—
Peter Debruge,
Variety,
15 Jan. 2025
Thesaurus Entries Near imperceptible
Cite this Entry
“Imperceptible.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/imperceptible. Accessed 22 Jan. 2025.
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