UNFATHOMABLE Synonyms: 99 Similar and Opposite Words

unfathomable

adjective

ˌən-ˈfa-t͟hə-mə-bəl

Definition of unfathomable

as in infinite

being or seeming to be without limits the unfathomable reaches of space

Synonyms & Similar Words

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Antonyms & Near Antonyms

as in incomprehensible

impossible to understand for some unfathomable reason the family decided to venture out into the blizzard

Synonyms & Similar Words

Antonyms & Near Antonyms

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 unfathomable At times, Columbia House offered deals that now seem unfathomable, like 12 CDs for a penny (with the catch being that purchasers have to start a subscription, which was often challenging to cancel). — Virginia Chamlee, PEOPLE, 18 Aug. 2026 Peart was a one-of-a-kind virtuoso, one of the greatest drummers rock ever knew, his monstrously complex parts so intrinsic to Rush’s sound that the idea of replacing him long seemed unfathomable. — Brian Hiatt, Rolling Stone, 14 Aug. 2026 Some people get excited about the idea of building product scaffolding at unfathomable scale. — Reed Albergotti, semafor.com, 7 Aug. 2026 Even for those of us who, for some unfathomable reason are not fascinated by high fashion history, this is an incredibly entertaining watch. — Rachel Elspeth Gross, Forbes.com, 7 Aug. 2026 See All Example Sentences for unfathomable

Recent Examples of Synonyms for unfathomable

Adjective

Then, in a famous 1937 paper, the mathematician Alan Turing devised a model based on hypothetical machines that could read and write symbols printed on an infinite tape according to a set of simple rules.

— Ben Brubaker, Quanta Magazine, 28 Aug. 2026
In a world of infinite access, experience becomes the scarcity.

— Jesse Kirshbaum, SPIN, 28 Aug. 2026

Definition of infinite

Adjective

War of the Worlds fuses post-9/11 paranoia and the terror of parenting to create one of Spielberg’s most thrilling blockbusters with a dark, genuinely scary atmosphere of ordinary people being wiped out by incomprehensible tragedy.

— Wesley Stenzel, Entertainment Weekly, 21 Aug. 2026
Farnaby’s character, a thickly-accented and mostly-incomprehensible farmer, was, of course, called Barry.

— Alex Ritman, Variety, 7 Aug. 2026

Definition of incomprehensible

Adjective

But although the mysterious connections between siblings are an area ripe for exploration, Herzog doesn’t seem all that interested beyond the quirk factor, making the film seem precious rather than perceptive.

— David Rooney, HollywoodReporter, 3 Sep. 2026
There’s a mysterious liquid dripping from the ceiling next to the changing table.

— Zachary Pincus-Roth, USA Today, 3 Sep. 2026

Definition of mysterious

Adjective

Following his 2019 essay for the New Yorker, Murakami recounts a compelling history of fatherhood, family and obligation, transforming an uncanny childhood memory into a deeply personal history.

— Los Angeles Times, Los Angeles Times, 31 Aug. 2026
My friend Austin, who has impeccable taste in bad movies and other internet esoterica, reflected on Breen’s uncanny charisma during a recent phone call.

— Becca Rothfeld, New Yorker, 29 Aug. 2026

Definition of uncanny

Adjective

Incomplete, corrupted, untimely, or unintelligible Submissions or Submission Forms will be disqualified.

— August 16, NPR, 16 Aug. 2026
When the surveillance footage resumes about an hour later, a man can be heard shouting, but the words are unintelligible, and a vehicle horn sounds.

— Kansas City Star, Kansas City Star, 10 Aug. 2026

Definition of unintelligible

Adjective

Rich Dad, Poor Dad is a hodgepodge of financial advice and confusing diagrams held together by anecdotes from Kiyosaki’s childhood.

— Christopher Cox, Vanity Fair, 26 Aug. 2026
Disability rights advocates fear the changes to special education oversight weaken the federal safety net for autistic students and others with disabilities, making these systems more confusing when families need help enforcing students’ rights.

— Claire Sibonney, Miami Herald, 26 Aug. 2026

Definition of confusing

Adjective

That's an important, if esoteric, distinction, as Asus already claimed the first RGB OLED gaming monitor (the ROG Swift PG34WCDN), and LG called dibs on the world’s first 39-inch 5K2K OLED gaming monitor with the GX9.

— Zackery Cuevas, PC Magazine, 27 Aug. 2026
Even though Truell was then chasing an esoteric idea around AI for CAD, Tisch and the partners at BoxGroup listened.

— Allie Garfinkle, Fortune, 26 Aug. 2026

Definition of esoteric

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unfathered

unfathomable

unfavorable

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“Unfathomable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unfathomable. Accessed 5 Sep. 2026.

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Synonyms of unfathomable

adjective

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