insurmountable

adjective

in·​sur·​mount·​able ˌin(t)-sər-ˈmau̇n-tə-bəl 

: incapable of being surmounted : insuperable

insurmountable problems

insurmountably

ˌin(t)-sər-ˈmau̇n-tə-blē 

adverb

Synonyms

• insuperable
• unconquerable
• invincible
• unstoppable
• indomitable
• unbeatable
• invulnerable
• impregnable
• bulletproof
• undefeated
• armored

Examples of insurmountable in a Sentence

They were faced with several insurmountable obstacles.

the familiar story of the underdog who ultimately triumphs despite insurmountable odds

Recent Examples on the Web

At first glance, those numbers are insurmountable for a state that just closed the fiscal year with a $2.6 billion surplus equal to 10% of its entire General Fund. —Keith M. Phaneuf, Hartford Courant, 8 Aug. 2025

As Republicans scramble in the aftermath, our campaign will continue to build insurmountable momentum needed to win next November. —Kate Plummer, MSNBC Newsweek, 8 Aug. 2025

The generational gap in AI fluency is not insurmountable if leaders refocus their strategic lens. —Holger Reisinger, Forbes.com, 7 Aug. 2025

More: Is Elon Musk's fight for a new third party 'an insurmountable thing'? —Diana Leyva, The Tennessean, 29 July 2025

Word History

First Known Use

1690, in the meaning defined above

Rhymes for insurmountable

• accountable
• demountable
• uncountable
• countable
• unaccountable

Kids Definition

insurmountable

adjective

in·​sur·​mount·​able ˌin(t)-sər-ˈmau̇nt-ə-bəl 

: incapable of being surmounted