spy

/spaɪ/

(military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors

中文释义：间谍；密探

The spy was caught trying to steal classified documents.

这名间谍在试图窃取机密文件时被抓获。

During the Cold War, both sides employed many spies.

冷战期间，双方都雇佣了许多间谍。