paroxysm
noun
                                                                                                                            
                                                            par·ox·ysm
                    
                                                                                                              
                                                                                                                                  ˈper-ək-ˌsi-zəm 
                                                                                                                              
                                                      
                                                          
            ˈpa-rək-,
                                                                                                                              also
    pə-ˈräk- 1
                    
                                          
              
          
                                                      : a fit, attack, or sudden increase or recurrence of symptoms (as of a disease) : convulsion                                      
              
                             
a paroxysm of coughing
                                       convulsed … in the paroxysms of an epileptic seizure—
Thomas Hardy
                         
                
                    2
                    
                                          
              
          
                                                      : a sudden violent emotion or action : outburst                                      
              
                             
a paroxysm of rage
                                       a paroxysm of laughter
                         
                
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  Merriam-Webster unabridged




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