American English

Definition of merciless adjective from the Oxford Advanced American Dictionary

     

    merciless

     adjective
    adjective
    NAmE//ˈmərsɪləs//
     
     
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  1. 1showing no kindness or sympathy synonym cruel
  2. 2 a merciless killer/attack the merciless heat of the sun She was subjected to the merciless criticism of her opponents. see also mercy
mercilessly
 
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adverb His friends teased him mercilessly when they found the poem.
See the Oxford Advanced Learner's Dictionary entry: merciless