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
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
The killing of the drone operators inspired a merciless Ukrainian counterattack that has inflicted heavy casualties on the Russian unit responsible for the murders, the 155th Naval Infantry Brigade.
—David Axe, Forbes, 24 Oct. 2024
The results are plain to see: the most just war in Israel’s history is seen by many around the world as brutal and merciless, an unfair battle between an Israeli Goliath and a Palestinian David.
—Ari Shavit, Foreign Affairs, 5 Oct. 2024
See all Example Sentences for merciless 
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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
The killing of the drone operators inspired a merciless Ukrainian counterattack that has inflicted heavy casualties on the Russian unit responsible for the murders, the 155th Naval Infantry Brigade.
—David Axe, Forbes, 24 Oct. 2024
The results are plain to see: the most just war in Israel’s history is seen by many around the world as brutal and merciless, an unfair battle between an Israeli Goliath and a Palestinian David.
—Ari Shavit, Foreign Affairs, 5 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 21 Nov. 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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