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.

That’s what happens when you have a fastball that reaches 100 miles per hour, a disappearing splitter and an array of breaking balls with inconceivable movement.

From The Wall Street Journal • Apr. 10, 2026

Having already had three managers this season, it seems inconceivable that owner Evangelos Marinakis will seek a fourth head coach before the campaign is out.

From BBC • Feb. 6, 2026

Since teaming up, Fournier Beaudry and Cizeron have won five of six competitions, a nearly inconceivable rise for such a new pair.

From Los Angeles Times • Feb. 6, 2026

“Given the volatility around earnings, it’s not inconceivable that there is a period of relative strength for technology,” Hackett said.

From MarketWatch • Jan. 21, 2026

It was inconceivable to me that one should surrender to what seemed wrong, and most of the people I had met seemed wrong.

From "Black Boy" by Richard Wright

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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