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

In terms of sheer duration, nothing tops the 1994-95 strike, a 232-day encounter between immovable object and unstoppable force that erased a total of 948 games and led to the cancellation of the World Series. —Anthony Crupi, Sportico.com, 18 Mar. 2026

Nemesis is the story of two men on either side of the law, the tale of what happens when an unstoppable force, expert criminal Coltrane Wilder (Y’lan Noel), meets an immovable object, brilliant police detective Isaiah Stiles (Matthew Law). —Rosy Cordero, Deadline, 18 Mar. 2026

That team went 12-0-3 in a month-long stretch (the NHL played five-minute 5-on-5 overtime periods, so there were ties) that saw the team raise its new Pacific Division-leading record from 13-5-3 to an unstoppable 25-5-6. —Tim Cowlishaw, Dallas Morning News, 16 Mar. 2026

Under this alignment of eloquent Mercury and unstoppable Mars in your in-depth 8th house, those connections could use a bit of extra attention. —Tarot.com, New York Daily News, 15 Mar. 2026

Word History

First Known Use

1836, in the meaning defined above