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
Season 2 doesn’t top the shocking novelty of the first season, made iconic by that giant mechanical girl in charge of a merciless game of red light, green light.
—
Tom Gliatto, People.com, 26 Dec. 2024
Photo: No Ju-han/Netflix Season two picks up exactly where the first left off, as Gi-hun devises a plan: track down the organizers of the game and end that merciless contest once and for all.
—Radhika Seth, Vogue, 26 Dec. 2024
But in the face of an increasingly merciless healthcare system, the battered team must put aside their differences and pull together to save lives.
—Lynette Rice, Deadline, 4 Dec. 2024
The woman doubts what is happening to her, doubts her surroundings, doubts her recent experiences, but the boy urges her on, merciless.
—Mikaella Clements & Onjuli Datta, Vulture, 1 Nov. 2024
See all Example Sentences for merciless 
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Tom Gliatto, People.com, 26 Dec. 2024
Photo: No Ju-han/Netflix Season two picks up exactly where the first left off, as Gi-hun devises a plan: track down the organizers of the game and end that merciless contest once and for all.
—Radhika Seth, Vogue, 26 Dec. 2024
But in the face of an increasingly merciless healthcare system, the battered team must put aside their differences and pull together to save lives.
—Lynette Rice, Deadline, 4 Dec. 2024
The woman doubts what is happening to her, doubts her surroundings, doubts her recent experiences, but the boy urges her on, merciless.
—Mikaella Clements & Onjuli Datta, Vulture, 1 Nov. 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 5 Jan. 2025.
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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