DICT.TW Dictionary Taiwan

 un·der·cov·er /-ˈkʌvɚ/
 (a.)祕密從事的,祕密的,被雇間諜活動的

 undercover
      adj : conducted with or marked by hidden aims or methods;
            "clandestine intelligence operations";
            "cloak-and-dagger activities behind enemy lines";
            "hole-and-corner intrigue"; "secret missions"; "a
            secret agent"; "secret sales of arms"; "surreptitious
            mobilization of troops"; "an undercover investigation";
            "underground resistance" [syn: clandestine, cloak-and-dagger,
             hole-and-corner(a), hugger-mugger, hush-hush, on
            the quiet(p), secret, surreptitious, underground]