unstoppable

[uhn-stop-uh-buhl] / ʌnˈstɒp ə bəl /

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irrepressible adj.
relentless adj.
relentless adj.

ADJECTIVE

irrepressible

Synonyms

STRONGEST

boisterous buoyant ebullient exuberant rebellious uncontrollable unrestrained

WEAK

bubbling bubbly enthusiastic inextinguishable insuppressible rhapsodical unconstrained uncontainable unmanageable unquenchable unrestrainable unruly

Antonyms

STRONGEST

controllable restrained

WEAK

depressed despondent grave

ADJECTIVE

relentless

Synonyms

STRONGEST

determined dogged ferocious fierce harsh implacable inexorable rigorous ruthless single-minded uncompromising unforgiving unrelenting unyielding

WEAK

adamant bound bound and determined dead set on go for broke grim hang in hang-tough hard inflexible inhuman mortal obdurate pitiless remorseless rigid stiff stop-at-nothing strict stringent unappeasable unbending undeviating unflinching vindictive

Antonyms

STRONGEST

compassionate easy flexible gentle irresolute kind lenient merciful mild nice nonviolent peaceful remorseful sympathetic tame tender yielding

WEAK

ending intermittent stopping understanding

ADJECTIVE

relentless

Synonyms

STRONGEST

incessant nonstop persistent punishing sustained tenacious unflagging unrelenting unremitting

WEAK

pertinacious unabated unbroken unfaltering unrelieved

Antonyms

STRONGEST

intermittent relenting surrendering yielding

WEAK

ending kind merciful stopping sympathetic understanding

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.

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unstoppable

NBC’s “Heroes” made Hayden Panettiere a household name by making us believe she was unstoppable.

From Salon ● Aug. 19, 2026

She's given to grand proclamations like "I'm unstoppable", or "I will exist in multitudes".

From BBC ● Aug. 12, 2026

Black holes are often pictured as unstoppable cosmic gluttons.

From Science Daily ● Jul. 31, 2026

The play follows the pair of brothers as they strive for success in the theatrical world amid William Shakespeare’s unstoppable rise.

From Los Angeles Times ● Jul. 13, 2026

Mom’s boss is an unstoppable robot workaholic lawyer, so this happens a lot.

From "Leah on the Offbeat" by Becky Albertalli

unstoppable

Example Sentences

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