inconceivable

[in-kuhn-see-vuh-buhl] / ˌɪn kənˈsi və bəl /

ADJECTIVE

beyond reason, belief

Synonyms

STRONGEST

extraordinary implausible impossible improbable incredible mind-boggling strange unbelievable unheard-of unimaginable unthinkable

WEAK

fantastic incogitable incomprehensible insupposable phony rare reachy staggering thin unconvincing unknowable unlikely unsubstantial weak won't fly won't wash

Antonyms

STRONGEST

believable common credible familiar likely normal plausible possible reasonable tenable usual

WEAK

conceivable fathomable imaginable

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.

Looking back, it seems inconceivable he didn't play in the first Ashes Test in Perth, when England went with five fast bowlers.

From BBC • Jun. 2, 2026

“All the ticket prices in this World Cup are inconceivable for previous World Cups,” Kuper said.

From Los Angeles Times • May 23, 2026

Two men broke a previously inconceivable barrier at the London Marathon on Sunday, both running 26.2 miles in under two hours and smashing the world record.

From The Wall Street Journal • Apr. 26, 2026

The idea of separating her family, Janie says, was "simply inconceivable", even if she had to leave behind her life in Missouri and start a new life in a country completely unknown to her.

From BBC • Apr. 24, 2026

However, it made no difference, for it was inconceivable that they could ever meet indoors or exchange any kind of written communication.

From "1984" by George Orwell

Vocabulary lists containing inconceivable

The Diary of Anne Frank

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Essential Academic Vocabulary for High School Students, List 2

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List 3

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