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 Expectations for a deal that establishes guardrails on AI are low on both sides, which continue to drive a headlong race toward potentially unfathomable intelligence capabilities. — Los Angeles Times, 17 Sep. 2026 Even for outdoor enthusiasts, the magnitude of destruction wrought by nature’s fury seemed unfathomable. — Holly Yan, CNN Money, 1 Sep. 2026 On behalf of myself, our staff, and the Board of Directors, we are entirely devastated by this unfathomable loss to Country Music and the entire world. — Steven J. Horowitz, Variety, 25 Aug. 2026 Building a racetrack in the middle of a city comes with an unfathomable number of logistical challenges. — Adam Kilgore, New York Times, 20 Aug. 2026 See All Example Sentences for unfathomable

Recent Examples of Synonyms for unfathomable

Adjective

To find the proof for zeta(3), Apéry sandwiched the function between two infinite series that converged at just the right speed to ensure zeta(3) must be irrational.

— Lyndie Chiou, Scientific American, 2 Oct. 2026
In truth, as God’s children the drivers were expressing infinite and omnipresent Mind.

— The Christian Science Monitor, Christian Science Monitor, 1 Oct. 2026

Definition of infinite

Adjective

Life unfolds over an incomprehensible span of scales, from our planet-enveloping biosphere at one end, to individual cell-building biomolecules at the other.

— Elise Cutts, Quanta Magazine, 23 Sep. 2026
The Music City Miracle now has a rival after Vanderbilt's improbable, and frankly incomprehensible, last-second victory against NC State on Saturday afternoon.

— Jon Root OutKick, FOXNews.com, 19 Sep. 2026

Definition of incomprehensible

Adjective

Lakes, mountains, forests and the endless islands are all within a few hours of Gothenburg so even without a car everything is accessible using the excellent trains, buses and ferries.

— Natasha Langan, TheWeek, 29 Sep. 2026
As attention fragments across endless feeds and screens, the moments people choose to show up for in person have become some of the most valuable in media.

— William Earl, Variety, 29 Sep. 2026

Definition of endless

Adjective

Jesse Plemons is superb as his mysterious Kenny becomes a key player in all this, and there is also exemplary work from Emma D’Arcy as Lina, Digger’s ever-faithful assistant, and Sophie Wilde who watches over the action with a keen eye.

— Pete Hammond, Deadline, 29 Sep. 2026
But key details of this profound primordial transition, such as its threshold energy and density, have remained deeply mysterious.

— Clara Moskowitz, Scientific American, 28 Sep. 2026

Definition of mysterious

Adjective

Phoebe Bridgers, in her first film role, pulls off an uncanny transformation as a decoy who bends lines of age and gender.

— Joe Reid, Vulture, 25 Sep. 2026
One of Mahomes’ many uncanny traits is that this traction and momentum will only feed off itself.

— Kansas City Star, Kansas City Star, 24 Sep. 2026

Definition of uncanny

Adjective

Then Mikayla makes an almost unintelligible crack about Doug, which sends Taylor back into a rage spiral.

— Kathleen Walsh, Vulture, 11 Sep. 2026
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

Definition of unintelligible

Adjective

Letting go of genre might sound confusing when the album’s named Popstar, but to Tinashe, a pop star is so much more than a genre label.

— Nicole Fell, HollywoodReporter, 2 Oct. 2026
In recent years, homeowners, developers and businesses have complained that navigating the Planning Department can be complicating and confusing.

— Jack Flemming, Los Angeles Times, 1 Oct. 2026

Definition of confusing

Adjective

But then Mehmet is let go from his job teaching esoteric music practices to university students and the household’s sole steady source of income is gone.

— Jessica Kiang, Variety, 30 Sep. 2026
Some say the public backlash to AI, and OpenAI, is partly because messaging from the leading labs can be esoteric, rather than grounded in the day-to-day benefits of AI, and in some cases, downright frightening.

— Emily Forlini, Fortune, 23 Sep. 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 Oct. 2026.

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Synonyms of unfathomable

adjective

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