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

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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

American theater at its best, at its most alive, is a place of infinite variety.

— Tom Selleck, USA Today, 11 Sep. 2026
The company relies on high-fidelity training simulators that replicate an infinite number of outcomes, such as system failures and peak-load scenarios, offline.

— Miroslav Katsarov, Forbes.com, 10 Sep. 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

The latter ensured fewer protests against seemingly endless deployments but also meant that a disproportionate share of the population would bear the burden.

— Michael E. Neagle, Hartford Courant, 8 Sep. 2026
Fed up with hacking through the endless lines of fees, charges, conditions, and restrictions on your wireless bill?

— K. Thor Jensen, PC Magazine, 8 Sep. 2026

Definition of endless

Adjective

In crucial moments the music fleetingly becomes mysterious, even ominous, with minor-key harmonies and a twisting vocal turn doubled by the bass line of the piano part.

— Literary Hub, Literary Hub, 10 Sep. 2026
These three mysterious elements of the cosmos have played a vital role in the evolution of large-scale cosmic structures like galaxies and galaxy clusters.

— Robert Lea, Space.com, 10 Sep. 2026

Definition of mysterious

Adjective

Each one of her novels presents a different setting and dynamic, but her oeuvre is unified by careful thought, sharp style, and an uncanny ability to make the pages want to turn.

— Literary Hub, Literary Hub, 9 Sep. 2026
Could something uncanny have occurred during the press screening for Don’t Look Back in Anger that had everyone getting misty?

— Nate Jones, Vulture, 7 Sep. 2026

Definition of uncanny

Adjective

Assuming viewers understood the history of English soccer — or even the offside rule — could make the broadcasts unintelligible for new fans who understood neither.

— Los Angeles Times, Los Angeles Times, 1 Sep. 2026
Incomplete, corrupted, untimely, or unintelligible Submissions or Submission Forms will be disqualified.

— August 16, NPR, 16 Aug. 2026

Definition of unintelligible

Adjective

Her coaching staff has worn IM8 swag, though things can get confusing because her coach, Anton Dubrov, is now part of the Eight Sleep team.

— Matthew Futterman, New York Times, 6 Sep. 2026
The decade-long fight — including the defeat of county efforts to keep the sand open to all, flip-flopping state laws and landowner lawsuits — has left beachgoers to navigate a confusing patchwork of beach access.

— Debbie Elliott, NPR, 4 Sep. 2026

Definition of confusing

Adjective

Both are craftsmen, interested in immediate emotional response over esoteric scholarly unpacking.

— Los Angeles Times, Los Angeles Times, 2 Sep. 2026
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

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 15 Sep. 2026.

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Synonyms of unfathomable

adjective

Example Sentences

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