The Collaborative International Dictionary
                    Weakliest
                    
                        
                
                                                                    Weakly \Weak"ly\, a. [Compar. Weaklier; superl. Weakliest.] Not strong of constitution; infirm; feeble; as, a weakly woman; a man of a weakly constitution.
Wiktionary
                    weakliest
                    
                        
                
                                                                    a. (en-superlative of: weakly)
WordNet
                    weakly
                    
                
                                                        
                    weakly
                    
                
                                                        
                    weakliest
                    
                        
                
                                                                    See weakly