UNTHINKABLE Synonyms: 66 Similar and Opposite Words

unthinkable

adjective

ˌən-ˈthiŋ-kə-bəl

Definition of unthinkable

as in incredible

too extraordinary or improbable to believe to most people it seemed unthinkable that such a gentle man could be guilty of such awful crimes

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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 unthinkable Network hookups that would have been unthinkable a generation ago now look like an economic necessity. — Scott Roxborough, HollywoodReporter, 8 July 2026 In the past, the possibility of endemic Ebola was unthinkable, and the international community was aligned and deeply committed. — Ivan Buendia Gayton, STAT, 7 July 2026 And an unthinkable Senegalese lapse set Youri Tielemans up for the equalizer just three minutes later. — Steven Louis Goldstein, New York Times, 6 July 2026 But football has repeatedly embraced innovations once viewed as unthinkable, from the back-pass rule to VAR and longer stoppage time. — Andrew Greif, NBC news, 3 July 2026 See All Example Sentences for unthinkable

Recent Examples of Synonyms for unthinkable

Adjective

Given Nolan’s famous aversion to AI, there was a relief in knowing this incredible display of creativity came primarily from practical effects and shooting on location.

— Hannah Abraham, Forbes.com, 18 July 2026
The Nordstrom Beauty annual sale has returned in grand style, and there are incredible deals to be had.

— Conçetta Ciarlo, Vogue, 18 July 2026

Definition of incredible

Adjective

Luther said that is unlikely to happen because the governor and lawmakers are campaigning for the November election.

— Jack Fink, CBS News, 14 July 2026
Although the third-place play-off counts towards fantasy points, that game is unlikely to be taken too seriously by either side and rotation could be an issue.

— Abdul Rehman, New York Times, 14 July 2026

Definition of unlikely

Adjective

In Uvalde — where the scars of the 2022 Robb Elementary School shooting remain impossible to ignore — one person was killed and dozens of homes were destroyed, compounding years of the community’s collective grief.

— Alaa Elassar, CNN Money, 20 July 2026
Four years after Minnesota’s Feeding Our Future fraud scandal emerged, theft from government programs has become impossible for state leaders to ignore as allegations continue to arise.

— Alex Derosier, Twin Cities, 19 July 2026

Definition of impossible

Adjective

Conspiracy theorists have proposed many different (though mostly superstitious and inconceivable) reasons why disappearances and disasters occur in the Bermuda Triangle.

— Andrea Romano, Travel + Leisure, 15 July 2026
And the power play was 17th in the NHL, which seems inconceivable for a team with as much offensive firepower as Tampa Bay.

— Scott Turick, The Orlando Sentinel, 11 July 2026

Definition of inconceivable

Adjective

Simon Hughes Yet another unbelievable goal from Mbappe Whoever ends up winning the Golden Boot will have a highlight reel for the ages.

— Amy Lawrence, New York Times, 9 July 2026
So to come out here and have a little competition, but then also with this unbelievable setting here in Tahoe.

— Ashlyn Robinette, PEOPLE, 9 July 2026

Definition of unbelievable

Browse Nearby Words

untethers

unthinkable

unthinkably

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“Unthinkable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unthinkable. Accessed 20 Jul. 2026.

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Synonyms of unthinkable

adjective

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