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Synonyms

insurmountable

American  
[in-ser-moun-tuh-buhl] / ˌɪn sərˈmaʊn tə bəl /

adjective

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

    an insurmountable obstacle.


insurmountable British  
/ ˌɪnsəˈmaʊntəbəl /

adjective

  1. incapable of being overcome; insuperable

"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

  • insurmountability noun
  • insurmountableness noun
  • insurmountably adverb

Etymology

Origin of insurmountable

First recorded in 1690–1700; in- 3 + surmountable ( def. )

Explanation

The adjective insurmountable describes some barrier that is incapable of being overcome. The Great Wall of China was meant to be an insurmountable deterrent to would-be invaders. Although the adjective insurmountable can be used to describe an actual physical barrier, it most often refers to a less tangible challenge. "The runner was disheartened because her competitor had an insurmountable lead in the race." "Because of insurmountable difficulties, the school's fall party had to be canceled. The water heater burst, raining gallons of water down on the gym, and flooding it. Since it was not a swimming party, the school wasn't able to clean up the mess in time to host the party."

Keep Reading on Vocabulary.com

Vocabulary lists containing insurmountable

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.

Not paying off your student loans can be an understandable temptation, especially when you’re facing what feels like an insurmountable amount of debt.

From MarketWatch • Apr. 11, 2026

But she said the challenge was not insurmountable.

From Barron's • Mar. 26, 2026

And for service workers—the people who staff hospitals, schools, restaurants and local government—the barriers are often insurmountable.

From The Wall Street Journal • Feb. 28, 2026

A double in the sixth edged GB in front again, but the concession of three in the following end gave the Americans a lead that looked insurmountable until Morrison's late intervention gave them a lifeline.

From BBC • Feb. 18, 2026

The Court justified this insurmountable hurdle on the grounds that considerable deference is owed the exercise of prosecutorial discretion.

From "The New Jim Crow" by Michelle Alexander