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Definitions

relentless

[ri-lent-lis] / rɪˈlɛnt lɪs /
ADJECTIVE
cruel, merciless
Synonyms
STRONGEST
determined dogged ferocious fierce harsh implacable inexorable rigorous ruthless single-minded uncompromising unforgiving unrelenting unstoppable 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
continuous, neverending
Synonyms
STRONGEST
incessant nonstop persistent punishing sustained tenacious unflagging unrelenting unremitting unstoppable
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.

Kaczmarek said that Cranston was relentless: “He would tell me, ‘I really want to get us back together again.’

From Los Angeles Times • Apr. 10, 2026

Mr. Magnussen’s performance, indelible and relentless, will define the warped values of a Musky-Zuck era for those inclined to hate it anyway.

From The Wall Street Journal • Apr. 9, 2026

Such has been the relentless nature of the schedule, there has been a feeling within the camp that they "can't breathe" at times.

From BBC • Apr. 9, 2026

Under the pressure of relentless attacks, Ukraine has already developed around 50 different interceptor models, an industry that barely existed a year ago.

From Barron's • Apr. 9, 2026

The Dancing Fan had been creeping up on Dad, a relentless Borg drone determined to assimilate us both, but as soon as he glanced at it, it stopped moving.

From "Darius the Great Is Not Okay" by Adib Khorram