Definition of barbarous adjective from the Oxford Advanced American Dictionary

     

    barbarous

     adjective
    adjective
    NAmE//ˈbɑrbərəs//
     
    (formal)
     
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  1. 1extremely cruel and shocking the barbarous treatment of these prisoners of war
  2. 2showing a lack of education and good manners
barbarously
 
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adverb
See the Oxford Advanced Learner's Dictionary entry: barbarous