1
                           general:: 
                            Phrase(s): (strictly) on the level 
honest; dependably open and fair.  •  How can I be sure you’re on the level?  •  You can trust Sally. She’s strictly on the level., Phrase(s): on the level 
honest; straightforward.  •  Come on now, on the level, tell me the truth.  •  Is the ad on the level?
                        
                        
 
                        
                            McGrawhill's American Idioms And Phrasal Verbs
                        
                        
                    
                    
                        2
                           general:: 
                            Honest, straightforward, sincere, as in You can believe her? she's on the level. This expression may have come from Freemasonry, where the carpenter's level symbolizes integrity. [Late 1800s]
                        
                        
 
                        
                            American Heritage Idioms