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
The most intriguing of the Japanese cast is Kasamatsu (a principal character on Max’s Tokyo Vice) as Major Nakamura, a thoughtful man who seems resistant to Colonel Kota’s instruction to be more merciless.
—
David Rooney, The Hollywood Reporter, 15 Feb. 2025
The temptation is too much for a merciless monarch to resist and she's briefed on the details of the team's counter-terrorism assignment.
—Jeff Spry, Space.com, 23 Jan. 2025
The merciless flames left gardeners, caregivers, domestic workers, child care providers and others without the tools needed to do their jobs.
—Suzanne Gamboa, NBC News, 16 Jan. 2025
The funniest movie ever made about the experience of being snubbed for an Oscar nomination, For Your Consideration found Christopher Guest and company moving away from their patented mockumentary format for this hilarious and merciless satire.
—Samantha Bergeson, IndieWire, 22 Jan. 2025
See all Example Sentences for merciless 
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David Rooney, The Hollywood Reporter, 15 Feb. 2025
The temptation is too much for a merciless monarch to resist and she's briefed on the details of the team's counter-terrorism assignment.
—Jeff Spry, Space.com, 23 Jan. 2025
The merciless flames left gardeners, caregivers, domestic workers, child care providers and others without the tools needed to do their jobs.
—Suzanne Gamboa, NBC News, 16 Jan. 2025
The funniest movie ever made about the experience of being snubbed for an Oscar nomination, For Your Consideration found Christopher Guest and company moving away from their patented mockumentary format for this hilarious and merciless satire.
—Samantha Bergeson, IndieWire, 22 Jan. 2025
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 22 Feb. 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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