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

There is not much to know about his condition publicly other than that the last three months may have been physically tougher on the once-unstoppable singer than what came before. — Chris Willman, Variety, 12 Oct. 2026

With the run as a hammer and Baugh with 600 rushing yards in four games, Faulkner’s attack was at times unstoppable through September. — Edgar Thompson, The Orlando Sentinel, 8 Oct. 2026

The kid who convinced his parents to name his little brother after former Yankees manager Joe Girardi now an unstoppable slugger? — Hannah Keyser, CNN Money, 7 Oct. 2026

The once unstoppable athletic titan expects more layoffs in 2027 after already cutting staff twice this year. — Matt Calkins Outkick, FOXNews.com, 5 Oct. 2026

Word History

First Known Use

1836, in the meaning defined above