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 24-time grand slam champion held a nearly insurmountable record of 289-1 when leading by two sets to none in majors – according to the TNT broadcast – and Fonseca having a mountain to climb may be an understatement. —Thomas Schlachter, CNN Money, 29 May 2026

In a weak American League, Detroit’s five-game deficit in the wild-card standings is not insurmountable. —Cody Stavenhagen, New York Times, 26 May 2026

There are so many obstacles in their way that can feel insurmountable. —Staff Author, Parents, 24 May 2026

Throw in Christian Walker’s two home runs against starter Colin Rea, and the Astros’ three-run lead in the third felt nearly insurmountable. —Andy Martinez, Chicago Tribune, 23 May 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