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 final moments of UConn’s 73-57 victory over UCLA on Sunday night were the culmination of a triumph in the NCAA Tournament, over a formidable opponent, and those two often insurmountable foes, injury and pain. —Dom Amore, Hartford Courant, 23 Mar. 2026

Atlanta outscored the Grizzlies in the first three quarters and had an insurmountable 41-point advantage at 116-75 after three periods. —ABC News, 23 Mar. 2026

Florida’s short warrant periods put insurmountable pressures on attorneys tasked with litigating for their clients facing execution. —Melanie Verdecia, Sun Sentinel, 22 Mar. 2026

Some battles were insurmountable. —Baz Bamigboye, Deadline, 21 Mar. 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