The Collaborative International Dictionary
                    Stealthiest
                    
                        
                
                                                                    Stealthy \Stealth"y\ (-[y^]), a. [Compar. Stealthier (-[i^]*[~e]r); superl. Stealthiest.] Done by stealth; accomplished clandestinely; unperceived; secret; furtive; sly.
[Withered murder] with his stealthy pace, . . .
         Moves like a ghost.                      
--Shak.
Wiktionary
                    stealthiest
                    
                        
                
                                                                    a. (en-superlative of: stealthy)
WordNet
                    stealthy
                    
                        
                
                                                        adj. marked by quiet and caution and secrecy; taking pains to avoid being observed; "a furtive manner"; "a lurking prowler"; "a sneak attack"; "stealthy footsteps"; "a surreptitious glance at his watch"; "someone skulking in the shadows" [syn: furtive, lurking, skulking, sneak(a), sneaky, surreptitious]
[also: stealthiest, stealthier]
                    stealthiest
                    
                        
                
                                                                    See stealthy