ㄓㄠˋㄧㄠㄐㄧㄥˋzhàoyāojìng

照妖镜
  1. 映照妖精原形鏡子比喻識別善惡真偽依據方法 法院判決書論證精審有如照妖鏡顯出嫌犯醜惡原形」。

magic mirror for revealing goblins, fig. way of seeing through a conspiracy