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

Years of overinvesting in hotel construction to the detriment of the rest of the economy and the country’s infrastructure inflicted not just insurmountable pain on the population but also made Cuba much less attractive as a tourism destination. —Nora Gámez Torres, Miami Herald, 23 Dec. 2025

And on this day, a 16-6 lead proved insurmountable. —Kansas City Star, 21 Dec. 2025

Patchett's latest is about the power of being known, the resonance of choices down the years and how love can endure even insurmountable odds. —Lizz Schumer, PEOPLE, 15 Dec. 2025

The spurt left the Golden Gophers facing an insurmountable 66-36 deficit. —CBS News, 11 Dec. 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