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Synonyms

unstoppable

American  
[uhn-stop-uh-buhl] / ʌnˈstɒp ə bəl /

adjective

  1. that cannot be stopped or surpassed; unbeatable.

    an unstoppable ball team.
unstoppable British  
/ ʌnˈstɒpəbəl /

adjective

  1. not capable of being stopped; extremely forceful

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • unstoppably adverb

Etymology

Origin of unstoppable

First recorded in 1830–40; un- 1 + stoppable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

And those unmoved by humanitarian concerns should think about an unstoppable wave of mass migration that may well be unleashed.

From Salon • Apr. 11, 2026

But where their previous schools saw disappointment, May saw a potentially unstoppable tandem that needed a change of scenery.

From The Wall Street Journal • Apr. 7, 2026

It also broke the spell Bovino had cast over many critics — myself included — who had feared he truly was an unstoppable Punisher.

From Los Angeles Times • Mar. 27, 2026

Four years ago, they were the unstoppable dream team, now they are the bitter rivals in a drawn out battle where only one survives.

From BBC • Mar. 24, 2026

Once cultures appeared, they never ceased to change and develop, and these unstoppable alterations are what we call ‘history’.

From "Sapiens: A Brief History of Humankind" by Yuval Noah Harari

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.