inconceivable

adjective

in·​con·​ceiv·​able ˌin-kən-ˈsē-və-bəl How to pronounce inconceivable (audio)
Synonyms of inconceivablenext
: not conceivable: such as
a
: unbelievable
It's inconceivable they survived the crash.
b
: impossible to comprehend
… a work of inconceivable difficulty and labour …Mary W. Shelley
inconceivability noun
inconceivableness noun
inconceivably adverb

Examples of inconceivable in a Sentence

The fire caused an inconceivable amount of damage. After coming this far, to quit now would be inconceivable.
Recent Examples on the Web
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.
But that now seems inconceivable because three Democrats dropped out. Los Angeles Times, 25 May 2026 Two weeks ago, two Triple-A hitting coaches brought Dylan Crews into their office and gave him two tasks that would have seemed inconceivable just five weeks before. Spencer Nusbaum, New York Times, 19 May 2026 Bradley’s film choreography, even in the numbers that Footer deems masterpieces, is above average, clever and assured, but Astaire’s art—inconceivable without the enormous influence of Bradley’s Black contemporaries, like John Bubbles—is in another league. Brian Seibert, New Yorker, 13 May 2026 The camera quality on Artemis, let alone the ability to livestream the views, was inconceivable during the Apollo era. Rebecca Boyle, The Atlantic, 10 Apr. 2026 See All Example Sentences for inconceivable

Word History

First Known Use

1624, in the meaning defined above

Time Traveler
The first known use of inconceivable was in 1624

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Cite this Entry

“Inconceivable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/inconceivable. Accessed 28 May. 2026.

Kids Definition

inconceivable

adjective
in·​con·​ceiv·​able ˌin-kən-ˈsē-və-bəl How to pronounce inconceivable (audio)
: impossible to imagine or believe
inconceivably adverb

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