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
Home to more than 675 million people across 11 countries, the region has seen temperatures reach unprecedented levels – with little respite from merciless heat and humidity, climatologist Maximiliano Herrera told CNN.
—
Heather Chen, CNN, 10 Apr. 2024
Wiseguys crop up all over as Danny’s boyhood crew takes on the merciless killers of his competitors.
—Sandra Dallas, The Denver Post, 26 Mar. 2024
See all Example Sentences for merciless 
Heather Chen, CNN, 10 Apr. 2024
Wiseguys crop up all over as Danny’s boyhood crew takes on the merciless killers of his competitors.
—Sandra Dallas, The Denver Post, 26 Mar. 2024
See all Example Sentences for merciless
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'merciless.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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 29 May. 2024.
Copy CitationKids Definition
merciless
adjective
mer·ci·less
ˈmər-si-ləs 
: having no mercy : pitiless
merciless slaughter
mercilessly
adverb
mercilessness
noun
Love words? Need even more definitions?
Merriam-Webster unabridged
Share