unthinkable

adjective

un·​think·​able ˌən-ˈthiŋ-kə-bəl How to pronounce unthinkable (audio)
Synonyms of unthinkablenext
1
: not capable of being grasped by the mind
2
: being contrary to what is reasonable, desirable, or probable : being out of the question
unthinkability noun
unthinkably adverb

Examples of unthinkable in a Sentence

to most people it seemed unthinkable that such a gentle man could be guilty of such awful crimes
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.
Whatever change and renewal is required at Newcastle heading into 2026-27, losing Guimaraes is unthinkable. Chris Waugh, New York Times, 29 May 2026 In a deeply raw and emotional essay, the comedian and former talk show host opened up about battling an unthinkable amount of guilt and shame after undergoing cosmetic surgery earlier this year. Christina Dugan Ramirez, FOXNews.com, 26 May 2026 Combating antisemitism is a moral imperative — one rooted, for me, in personal history that makes indifference unthinkable. Austin Turner, CBS News, 26 May 2026 That defense, aided by goals from Stone and Cole Smith, led to a 2-1 victory and an unthinkable sweep of Colorado for the Knights' third final in nine seasons. ABC News, 26 May 2026 See All Example Sentences for unthinkable

Word History

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of unthinkable was in the 15th century

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Cite this Entry

“Unthinkable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unthinkable. Accessed 30 May. 2026.

Kids Definition

unthinkable

adjective
un·​think·​able ˌən-ˈthiŋ-kə-bəl How to pronounce unthinkable (audio)
ˈən-
: not to be thought of or considered as possible
unthinkable cruelty

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