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

Relevance

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 Much of what already happened was unfathomable when RCX Sports won the NFL FLAG contract, which has been renewed several times. — Tim Graham, New York Times, 2 July 2026 Two months of heavy rainfall resulted in then-unfathomable devastation that still reverberates today. — Kansas City Public Library Staff, Kansas City Star, 1 July 2026 The money the Hornets still owed Ball was almost unfathomable in normal circles, but not in the NBA’s alternate universe. — Scott Fowler, Charlotte Observer, 25 June 2026 The race to $1 trillion once seemed unfathomable, but Musk has climbed the ranks of the world’s wealthiest at a rapid pace. — Danielle Chemtob, Forbes.com, 15 June 2026 See All Example Sentences for unfathomable

Recent Examples of Synonyms for unfathomable

Adjective

Markets are designed to adjust to circumstances, but the elasticity of the system is not infinite.

— George Calhoun, Forbes.com, 31 July 2026
Scooby-Doo’s bag that opens to a pocket universe and is capable of storing an infinite amount of things, including refrigerators, giant sandwiches, and entire sets of flatware that belonged to the late queen?

— Brian Moylan, Vulture, 29 July 2026

Definition of infinite

Adjective

But given the profundity of her subject matter and the near-universal awe her art inspires, perhaps this sense of futility gestures at the incomprehensible, even transcendent aura around Petviashvili’s works.

— The Editors of ARTnews, ARTnews.com, 28 July 2026
Here are three stars that appear neatly connected overhead, but in reality, one is separated by an incomprehensible distance.

— Jamie Carter, Space.com, 24 July 2026

Definition of incomprehensible

Adjective

Its spirit is fueled by the stunning beauty of places like Yellowstone National Park, wide-open skies, endless horizons, and a frontier spirit that’s been alive for centuries.

— Condé Nast Traveler, Condé Nast Traveler, 5 Aug. 2026
Shopping for styles that pair seamlessly together can be a challenge, especially when you’re faced with endless options and an empty cart.

— Kaitlin Marks, Travel + Leisure, 4 Aug. 2026

Definition of endless

Adjective

Then there’s the new, mysterious character played by Sadie Sink, introducing a major element of MCU lore that has very little to do with Spider-Man.

— David Sims, The Atlantic, 30 July 2026
And after a few days of searching, law enforcement received a mysterious eyewitness tip.

— Dateline NBC, NBC news, 30 July 2026

Definition of mysterious

Adjective

Played with tricksy force and a glint of anger in her eyes by Samantha Morton, Circe is at the center of the greatest scene in The Odyssey, one that foregrounds the grandeur and uncanny qualities of myth.

— Angelica Jade Bastién, Vulture, 27 July 2026
Critics have praised this Dalloway riff for its entrancing, uncanny visuals.

— Brittany Allen, Literary Hub, 27 July 2026

Definition of uncanny

Adjective

Claypool’s voice, formerly a sharp and declarative figure in the mix, slinks down into silty waters, often unintelligible and almost always emotionally ambiguous.

— Sasha Geffen, Pitchfork, 2 Aug. 2026
The world premiere on Sunday – in the presence of Illumination boss Chris Meledandri and director Pierre Coffin, who is also the origin of the minions’ unintelligible chatter – kicks off one of the biggest Annecy Film Festival’s yet.

— Melanie Goodfellow, Deadline, 19 June 2026

Definition of unintelligible

Adjective

Jean appears to be the first character in that reset, which is confusing because the old versions of various X-Men characters are still here.

— Eliana Dockterman, Time, 31 July 2026
Meanwhile, thousands more are waiting in county jails for cases that are winding through a new, convoluted and confusing system where geography controls the rules.

— Los Angeles Times, Los Angeles Times, 31 July 2026

Definition of confusing

Adjective

Of course, Yamagata is a long way to go just to peep some jellyfish, so combine a visit with the misty temples of nearby Dewa Sanzan, three mountains sacred to the ascetics of the esoteric Shugendo religion.

— Jessica Kozuka, Travel + Leisure, 2 Aug. 2026
To waste all these resources on some esoteric arty thing, that’s when the schism started to happen for me.

— Zac Ntim, Deadline, 29 July 2026

Definition of esoteric

Browse Nearby Words

unfathered

unfathomable

unfavorable

See all Nearby Words

Cite this Entry

Style

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

Copy Citation

Synonyms of unfathomable

adjective

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster on unfathomable

More from Merriam-Webster

Word of the Day

colloquial

Popular in Grammar & Usage

7 Pairs of Commonly Confused Words

Merriam-Webster’s Great Big List of Words You Love to Hate

Is it 'nerve-racking' or 'nerve-wracking'?

'Sneaked' or 'Snuck': Which is correct?

Why does English have so many silent letters?

Popular in Wordplay

Dutch Treat and French Leave: Eight Place-Based Compounds

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List

How long is a jiffy?

Even More Bird Names that Sound Like Insults (and Sometimes Are)

Popular

7 Pairs of Commonly Confused Words

Dutch Treat and French Leave: Eight Place-Based Compounds

14 Phobias You Probably Haven't Heard Of

Games & Quizzes