Insisting; persistent; persevering.
                                                            
                                                     
                        
                                                
                        
                        
                            persistently continual; "the bluejay's insistent cry" 
                                                            
                                                     
                        
                                                
                        
                        
                            demanding attention; "clamant needs"; "a crying need"; "regarded literary questions as exigent and momentous"- H.L.Mencken; "insistent hunger"; "an instant need"