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

Your 8th House of Psychology hosts Mercury, whose quincunx with unstoppable Jupiter in your sign could stir up important talks about money and trust with a loved one. —Tarot.com, Hartford Courant, 30 Jan. 2026

In his debut, Thorbjornsen’s putter seemed unstoppable, becoming the first player to roll in four consecutive putts from beyond 10 feet. —Tim Corlett, Forbes.com, 28 Jan. 2026

Sean McVay's offense seemed unstoppable, posting 27 points and 479 yards, but a special-teams error cost the Rams, again. —Dianna Russini, New York Times, 26 Jan. 2026

Throughout the ’90s and early 2000s, Khan’s star power seemed unstoppable. —Naman Ramachandran, Variety, 24 Jan. 2026

Word History

First Known Use

1836, in the meaning defined above