unsolved
adjective
                                                                                                                            
                                                            un·solved
                    
                                                                                                              
                                                                                                                                  ˌən-ˈsälvd  
                                                                                                                              
            -ˈsȯlvd
                                                      
                                                          
                                
              
          
                                                      : not explained, corrected, or dealt with : not solved                                      
              
                             
an unsolved problem
                                       unsolved math equations
                         
                
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  Merriam-Webster unabridged




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