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

By 2018, neural networks and algorithmic breakthroughs had finally made robotic dexterity and navigation less insurmountable. —Neetika Walter, Interesting Engineering, 5 Dec. 2025

Contributor Elise Portale gave AD the download on its insurmountable fame, and tested the ergonomic icon herself. —Julia Harrison, Architectural Digest, 1 Dec. 2025

Democrats in New York also filed a lawsuit to challenge what appeared to be an insurmountable hurdle of a state constitutional amendment. —Benjamin Siegel, ABC News, 30 Nov. 2025

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