undercover

un·der·cov·er

U0049400 (ŭn′dər-kŭv′ər)adj.1. Conducted in secret or through the use of subterfuge, as in a police investigation or in spying: an undercover investigation.2. Engaged or employed in undercover activity: undercover FBI agents.

undercover

(ˌʌndəˈkʌvə) adjdone or acting in secret: undercover operations.

un•der•cov•er

(ˌʌn dərˈkʌv ər, ˈʌn dərˌkʌv-)

adj. 1. clandestine or secret. 2. engaged in securing confidential information. [1850–55]

Thesaurus

Adj.

1.

undercover - 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"clandestine, cloak-and-dagger, hush-hush, secret, surreptitious, underground, hole-and-corner, hugger-muggercovert - secret or hidden; not openly practiced or engaged in or shown or avowed; "covert actions by the CIA"; "covert funding for the rebels"

undercover

adjective secret, covert, clandestine, private, hidden, intelligence, underground, spy, concealed, confidential, hush-hush (informal), surreptitious an undercover operation designed to catch drug smugglers
open, plain, visible, manifest, overt, unconcealed

undercover

adjectiveExisting or operating in a way so as to ensure complete concealment and confidentiality:clandestine, cloak-and-dagger, covert, huggermugger, secret, sub rosa.Informal: hush-hush.Idiom: under wraps.

Translations

卧底的秘密的

undercover

(ˈandəˈkavə) adjective working or done in secret. He is an undercover agent for the Americans. 臥底的 秘密的，卧底的