1
                    as in defeated
                                                
              
          
                                                      to achieve a victory over                                       
              
                             finally mastered her longtime opponent at chess                         
                
                                                                                                                                                                                                                                                              
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              Antonyms & Near Antonyms
2
                    as in learned
                                                
              
          
                                                      to acquire complete knowledge, understanding, or skill in                                       
              
                             I think I've mastered algebra at last                         
                
                                                                                                                                                                                                                                                              
        Synonyms & Similar Words
Antonyms & Near Antonyms
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  Merriam-Webster unabridged




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