悬案 (xuán àn) — (legal) unsolved case, unsettled lawsuit; outstanding issue, unresolved question (in general or non-legal contexts)

Definition

Examples

• 这个悬案已经过了二十年还没解决。
  Zhè ge xuán àn yǐ jīng guò le èr shí nián hái méi jiě jué.
  This unresolved case has gone twenty years without being solved.
• 那个历史悬案至今仍是学者争论的焦点。
  Nà ge lì shǐ xuán àn zhì jīn réng shì xué zhě zhēng lùn de jiāo diǎn.
  That historical unsettled issue is still the focus of scholarly debate.
• 警方正全力调查这桩悬案。
  Jǐng fāng zhèng quán lì diào chá zhè zhuāng xuán àn.
  The police are thoroughly investigating this unsolved case.