Synonyms
- affectless
- callous
- case-hardened
- cold-blooded
- compassionless
- desensitized
- hard
- hard-boiled
- hard-hearted
- heartless
- indurate
- inhuman
- inhumane
- insensate
- insensitive
- ironhearted
- obdurate
- pachydermatous
- pitiless
- remorseless
- ruthless
- slash-and-burn
- soulless
- stony
- stoney
- stonyhearted
- take-no-prisoners
- thick-skinned
- uncharitable
- unfeeling
- unmerciful
- unsparing
- unsympathetic
Examples of merciless in a Sentence
the merciless killing of innocent people
He has been merciless in his criticism of his opponent.
Recent Examples on the Web
Tragedies like these were confrontations — merciless verbal duels in which two characters plead their case, go on the attack, try to take each other apart.
—
Sara Holdren, Vulture, 23 Sep. 2024
And as long as that’s their take, merciless heckling of those umps should be, too.
—Rolling Stone, 29 June 2024
Their idea involved merciless kills, a chainsaw, a group of youths and a homicidal family with a craving for human flesh; all set against the backdrop of a sunny, countryside day giving way to a nightmarish evening.
—Sydney Bishop, CNN, 31 Oct. 2024
For most of them, the rigors of fighting on the eastern front only increased the value of fighting a merciless war—Hitler's war.
—Nina Turner, Newsweek, 29 Oct. 2024
See all Example Sentences for merciless 
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Sara Holdren, Vulture, 23 Sep. 2024
And as long as that’s their take, merciless heckling of those umps should be, too.
—Rolling Stone, 29 June 2024
Their idea involved merciless kills, a chainsaw, a group of youths and a homicidal family with a craving for human flesh; all set against the backdrop of a sunny, countryside day giving way to a nightmarish evening.
—Sydney Bishop, CNN, 31 Oct. 2024
For most of them, the rigors of fighting on the eastern front only increased the value of fighting a merciless war—Hitler's war.
—Nina Turner, Newsweek, 29 Oct. 2024
See all Example Sentences for merciless
Articles Related to merciless
Dictionary Entries Near merciless
Cite this Entry
“Merciless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/merciless. Accessed 3 Dec. 2024.
Copy CitationKids Definition
merciless
adjective
mer·ci·less
ˈmər-si-ləs 
: having no mercy : pitiless
merciless slaughter
mercilessly
adverb
mercilessness
noun
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