cloak-and-dagger

详细解释:a. 描写间谍密探的, 搞特务活动的, 间谍的, 阴谋的

英语解释：

形容词 cloak-and-dagger:

conducted with or marked by hidden aims or methods同义词：clandestine, hole-and-corner, hugger-mugger, hush-hush, secret, surreptitious, undercover, underground