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

Faced with an unstoppable onslaught of divisive political messaging, social cohesion could break down and government decision-making processes could become paralyzed. —James P. Rubin, Foreign Affairs, 19 Nov. 2025

The collective joy spilled over, unstoppable, filling the camp like a tide that had been held back for too long. —Literary Hub, 13 Nov. 2025

The industry vet says she is blown away by Brave’s passion for her craft and unstoppable drive. —Madeleine Marr, Miami Herald, 13 Nov. 2025

Seemingly unstoppable, only one person stands in his way — a tenacious prosecutor, Jang Geon-young (played by Jung) who can’t be bought or bribed. —Sara Merican, Deadline, 12 Nov. 2025

Word History

First Known Use

1836, in the meaning defined above