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

And then the Buckeyes beat Ball State 56-3 in Week 1, with Sayin and Smith looking unstoppable. — The Athletic College Football Staff, New York Times, 9 Sep. 2026

The question now is just how unstoppable the far right’s rise in Europe really is. — Melissa Bell, CNN Money, 8 Sep. 2026

The 6-foot-2 senior middle blocker was unstoppable last Tuesday against Thousand Oaks. — Ethan Hanson, Daily News, 7 Sep. 2026

But, unlike Clark, who has proven to be mentally unstoppable, the mean girls might be onto something. — Joe Kinsey Outkick, FOXNews.com, 4 Sep. 2026

Word History

First Known Use

1836, in the meaning defined above