悬案 (懸案) xuán'àn
          
              xuán'àn 
              
              noun 
              unresolved question; unresolved case 
              Domain: Modern Chinese 现代汉语
              
              
              
              
                Notes: (CC-CEDICT '懸案'; Guoyu '懸案'; Mathews 1931 '懸案', p. 6)