Definitions

unthinkable

[uhn-thing-kuh-buhl] / ʌnˈθɪŋ kə bəl /

ADJECTIVE

incredible, unusual

Synonyms

STRONGEST

absurd extraordinary illogical implausible impossible improbable inconceivable preposterous rare unbelievable uncommon unimaginable unlikely unreasonable

WEAK

beyond belief beyond possibility exceptional incogitable insupportable out of the question outlandish singular unique unordinary

Antonyms

STRONGEST

believable cheap common familiar imaginable likely logical normal ordinary plausible possible probably rational reasonable regular sensible tenable usual

WEAK

conceivable credible

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

E. Jean Carroll achieved the unthinkable and might end up paying a price for it.

From Slate • Jun. 1, 2026

They point to domains where unthinkable technological advances have improved human performance, from Go players to chess grandmasters.

From The Wall Street Journal • May 30, 2026

According to Cedar Point, as all of this verbiage is, Millennium Force “shoots riders over hills, past lagoons and through tunnels, all at unthinkable speeds.”

From Los Angeles Times • May 29, 2026

The Knicks trailed Game 1 of the Eastern Conference Finals by 22 points in the fourth quarter against the Cleveland Cavaliers—and then they produced the unthinkable.

From The Wall Street Journal • May 20, 2026

If the unthinkable could happen, if your family could vanish in a moment, why couldn’t a sculpture of a screecher come to life?

From "Willodeen" by Katherine Applegate

unthinkable

Example Sentences

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