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

With an insurmountable lead, Aledo’s backups took over. —Charles Baggarly, Fort Worth Star-Telegram, 29 Nov. 2025

Contributor Elise Portale gave AD the download on its insurmountable fame, and tested the ergonomic icon herself. —Julia Harrison, Architectural Digest, 28 Nov. 2025

There are a few delicate, but not insurmountable, details that must be sorted out and will require further talks between Ukraine, Russia, and the United States. —Camilla Schick, CBS News, 25 Nov. 2025

And maybe the differences between us do feel more insurmountable. —Lamorna Ash, The Dial, 25 Nov. 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