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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.

The market is betting on peace in the war with Iran while riding the relentless surge in tech stocks.

From Barron's • May 7, 2026

“No matter what, they’re relentless in their pursuit,” he said.

From Los Angeles Times • May 6, 2026

One man, who joined the SYP at the same time as Linden as a teenager, said Linden's touching, on the face or the cheek or the neck, was "relentless".

From BBC • May 6, 2026

Tyrannosaurs are usually depicted as powerful, relentless predators.

From Science Daily • May 5, 2026

The terrible nausea she had known as a child came galloping back, and it was relentless.

From "The Woman All Spies Fear" by Amy Butler Greenfield

Vocabulary lists containing relentless

The Giver

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A Long Walk to Water

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Power Suffix: -less

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