unthinkable

adjective

un·​think·​able ˌən-ˈthiŋ-kə-bəl How to pronounce unthinkable (audio)
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.
Sea change on zoning California and New York City’s recent reforms would have once been unthinkable. Cnn.com Wire Service, Mercury News, 28 Oct. 2025 The free pass in the ninth would normally have been unthinkable, this time of year. Mirjam Swanson, Oc Register, 28 Oct. 2025 Faced with an unthinkable dilemma for a parent, Sigg called police to help turn in her son, Austin Reed Sigg, for a violent and heinous crime. Dakin Andone, CNN Money, 26 Oct. 2025 Reaves scored a career-high 51 points and the Lakers amassed an unthinkable 46-18 advantage in free-throw attempts in a 127-120 victory before a sellout crowd of 17,832 at Golden 1 Center in Sacramento. Jason Anderson, Sacbee.com, 26 Oct. 2025 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 31 Oct. 2025.

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

More from Merriam-Webster on unthinkable

Last Updated: - Updated example sentences
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