a person who tries secretly to obtain information for one country in the territory of another usually unfriendly countrya secret agent posing as a government employee
a secret agent posing as a government employee
agents, assets, emissaries, intelligencers, moles, operatives, spies, spooks, undercovers
courierscounterspies, double agents, sleepersinfiltrators, informers, stool pigeonsspymasters, superspies
英语同义词词典收录了63618条英语词条，基本涵盖了全部常用同义词或反义词的辨析及翻译，是英语学习的有利工具。