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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 (also stoney), stonyhearted, take-no-prisoners, thick-skinned, uncharitable, unfeeling, unmerciful, unsparing, unsympathetic
Antonyms
charitable, compassionate, humane, kindhearted, kindly, merciful, sensitive, softhearted, sympathetic, tender, tenderhearted, warm, warmhearted
Recent Examples on the Web
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'merciless.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
14th century, in the meaning defined above
More Definitions for merciless
merciless
See the full definition for merciless in the English Language Learners Dictionary
Other Words from merciless
More from Merriam-Webster on merciless
Thesaurus: All synonyms and antonyms for merciless
Spanish Central: Translation of merciless
Nglish: Translation of merciless for Spanish Speakers
Britannica English: Translation of merciless for Arabic Speakers
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