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insuperable

American  
[in-soo-per-uh-buhl] / ɪnˈsu pər ə bəl /

adjective

  1. incapable of being passed over, overcome, or surmounted.

    an insuperable barrier.


insuperable British  
/ -prəbəl, -ˈsjuː-, ɪnˈsuːpərəbəl /

adjective

  1. incapable of being overcome; insurmountable

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Etymology

Origin of insuperable

First recorded in 1300–50; Middle English word from Latin word insuperābilis. See in- 3, superable

Explanation

Perhaps if you are a superhero, you can tackle an insuperable problem — one that is considered impossible to overcome. Insuperable is an adjective that is often paired with nouns like difficulty, obstacle, and barrier. An insuperable difficulty is not just difficult; it’s impossible. And an insuperable obstacle is not like a hurdle on a running track that slows you down a little; it stops you entirely. The opposite of insuperable is, of course, superable, though it’s less commonly used than its negative counterpart.

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Vocabulary lists containing insuperable

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.

Here and elsewhere, scale is a messaging device, speaking of the Roman imperium’s insuperable need to seize and control large swaths of space.

From The Wall Street Journal • Oct. 22, 2025

While that seemingly insuperable detail gets worked out, I would urge executives at HBO and its streaming rivals to consider optioning Adjmi’s drama for a new series, limited or otherwise.

From Los Angeles Times • Jun. 17, 2024

That assured at least a halving of the match with Viktor Hovland — the halving did come — and pushed the United States to an insuperable 14½ points.

From Washington Post • Sep. 26, 2021

If the left’s challenges appear daunting, they are perhaps not yet insuperable.

From New York Times • Sep. 2, 2021

Galen’s extraordinary logorrhoea—his surviving works amount to 3 million words, and represent perhaps a third of what he wrote—is the consequence of his obsessive and futile effort to overcome this insuperable obstacle.

From "The Invention of Science" by David Wootton

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