in the back of one's mind
                        
                        
                    
                 
                
                
                    
                    
                    
                    
                    
                        Cool Hand Luke
                        
Proper Name, Cinema                        
                    
                 
                
                
                
                
                    
                    
                    
                    
                    
                        to back onto something
                        
Verb                        
                    
                 
                
                    
                    
                    
                    
                    
                        to leave nothing but debts
                        
Verb                        
                    
                 
                
                
                
                
                
                    
                    
                    
                    
                    
                        to have it its train
                        
Verb                        
                    
                 
                
                
                    
                    
                    
                    
                    
                        to die worth a million
                        
Verb                        
                    
                 
                
                
                
                    
                    
                    
                    
                    
                        to ride seat on a pillion
                        
Verb                        
                    
                 
                
                
                
                    
                    
                    
                    
                    
                        to be at the root of ...
                        
Verb                        
                    
                 
                
                    
                    
                    
                    
                    
                        to lie at the root of ...
                        
Verb                        
                    
                 
                
                
                    
                    
                    
                    
                    
                        to linger behind others
                        
Verb                        
                    
                 
                
                    
                    
                    
                    
                    
                        endorsement on a document
                        
                        
                    
                 
                
                
                    
                    
                    
                    
                    
                        to be at the back of sth
                        
Verb                        
                    
                 
                
                
                
                    
                    
                    
                    
                    
                        to be all for something
                        
Verb                        
                    
                 
                
                    
                    
                    
                    
                    
                        to disguise one's worries beneath a cheerful appearance
                        
Verb                        
                    
                 
                
                
                    
                    
                    
                    
                    
                        to be behind the scenes
                        
Verb                        
                    
                 
                
                    
                    
                    
                    
                    
                        at the top (bottom , side , beginning , end , front , back ,
                        
                        
                    
                 
                
                
                
                
                
                    
                    
                    
                    
                    
                        to be veiled in mystery
                        
Verb