unstoppable

adjective

un·​stop·​pa·​ble ˌən-ˈstä-pə-bəl 

: incapable of being stopped

an unstoppable runaway truck

an unstoppable army

an unstoppable rise to power

unstoppably

ˌən-ˈstä-pə-blē 

adverb

Synonyms of unstoppable

• invincible
• indomitable
• unbeatable
• insurmountable
• unconquerable
• invulnerable
• impregnable
• undefeated
• bulletproof
• armored

Examples of unstoppable in a Sentence

At this point in the campaign, he appears to be unstoppable.

at this point she's so far ahead in the polls that she's unstoppable

Recent Examples on the Web

Though the premise sounds far-fetched, Cammell creates a sense of overwhelming dread that never lets up as the threat of an unstoppable AI grows more and more personal, migrating from theory, to our homes, to our bodies. —Keith Phipps, Vulture, 23 Apr. 2026

But this is a story about Democrats, who are adapting to the collapse in trust of traditional media and the seemingly unstoppable rise of influencers and podcasters. —David Weigel, semafor.com, 22 Apr. 2026

Nureyev is 23, a rebellious Soviet defector — magnetic, explosive, unstoppable. —Leo Barraclough, Variety, 22 Apr. 2026

Similarly unstoppable at the moment is Levante forward Espi, with seven goals in his last six La Liga appearances. —Thom Harris, New York Times, 21 Apr. 2026

Word History

First Known Use

1836, in the meaning defined above