unimaginable

adjective

un·​imag·​in·​able
ˌən-ə-ˈmaj-nə-bəl
-ˈma-jə- How to pronounce unimaginable (audio)
Synonyms of unimaginablenext
: not imaginable or comprehensible
unimaginable horror
technology that was unimaginable only a few years ago
unimaginably
ˌən-ə-ˈmaj-nə-blē
-ˈma-jə How to pronounce unimaginable (audio)
adverb

Examples of unimaginable in a Sentence

the unimaginable horrors of war a disaster of almost unimaginable proportions This technology would have been unimaginable five years ago.
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 the Sabres captain has played in 48 games this season while dealing with an unimaginable situation away from the rink. Matthew Fairburn, New York Times, 28 Jan. 2026 That fragile but fierce promise helped Fritzie endure the unimaginable. Bernard Cherkasov, Chicago Tribune, 27 Jan. 2026 When a guest commentator explodes on live television in an unimaginable crime, the world is thrust into shock. Patrick Brzeski, HollywoodReporter, 27 Jan. 2026 But not unreasonable or unimaginable. Literary Hub, 27 Jan. 2026 See All Example Sentences for unimaginable

Word History

First Known Use

1611, in the meaning defined above

Time Traveler
The first known use of unimaginable was in 1611

Browse Nearby Words

Cite this Entry

“Unimaginable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unimaginable. Accessed 2 Feb. 2026.

More from Merriam-Webster on unimaginable

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!