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

Overcoming human psychology may be the most insurmountable chore when implementing technology. — Joe McKendrick, Forbes.com, 27 July 2026

Fifty points isn’t an insurmountable gap for Russell to overcome. — Madeline Coleman, New York Times, 21 July 2026

Some may view them as proof the climate crisis has already become insurmountable. — Rebecca Florsheim, STAT, 17 July 2026

Now, if the eight-time All-Pro and three-time Defensive Player of the Year Donald returns to line up next to Garrett on the Rams’ defensive line, that will create a seemingly insurmountable headache for the Giants in Week 2. — Pat Leonard, New York Daily News, 17 July 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