scintillating
adjective
                                                                                                                            
                                                            scin·til·lat·ing
                    
                                                                                                              
                                                                                                                                  ˈsin-tə-ˌlā-tiŋ  
                                                      
                                                          
            
                                
              
          
                                                      : brilliantly lively, stimulating, or witty                                      
              
                             
a scintillating conversation
                         
                
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  Merriam-Webster unabridged




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