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 of insurmountable

• 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

The report highlights that even as fiber lines are extended into rural areas and billions of federal and state dollars are deployed, affordability and access remain insurmountable barriers for many families. — Erin Mote, Forbes.com, 15 Sep. 2026

Charlotte leaders on Monday lambasted the state as a bad faith partner but indicated the financial pressure campaign might be an insurmountable obstacle. — Charlotte Observer, 15 Sep. 2026

Maybe your favorite wrestler finally overcomes insurmountable odds to become a world champion. — Ryan Gaydos Outkick, FOXNews.com, 2 Sep. 2026

But writing a memoir about her lifelong relationship with Freddie Mercury felt insurmountable. — Melissa Ruggieri, USA Today, 2 Sep. 2026

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