slough of despond
noun phrase
                                                                                                                            
                                                            slough of de·spond
                    
                                                                                                              
                                                                                                                                  ˌslau̇-əv-di-ˈspänd 
                                                                                                                              
            ˌslü-
                                                      
                                                          
                                
              
          
                                                      : a state of extreme depression                                      
                
                    
Love words? Need even more definitions?
  
  Merriam-Webster unabridged




Share