in petto

1 I tell you this in strict privacy.

我极秘密地告诉你这件事。

2 The negotiation is going on in private.

谈判正在秘密地进行。

1 秘密

tête-à-tête hugger-mugger close inside private secret interior hidden underground closet mysterious confidential sneak undercover backstage esoteric privy cryptic clandestine backdoor stealthy backroom underhanded underhand closed-door sneaking surreptitious hush-hush under-the-table unavowed back-street undivulged huggermugger hole-and-corner backstair secretly darkly confidentially surreptitiously cryptically secretively privily unavowedly privacy confidence mystery darkness confidentiality stealth secrecy QT secretiveness arcanum re- hide on the qt under the rose under hat sub rosa in strict confidence under cover behind closed doors in confidence through the back door by the back door dark pocket quiet inner cabinet chamber retired shady occult sly subterranean under-the-counter cryptical subrosa privity penetralia intimity crypto- by-

2 秘密的

tête-à-tête hugger-mugger close inside private secret interior hidden underground closet mysterious confidential sneak undercover backstage esoteric privy cryptic clandestine backdoor stealthy backroom underhanded underhand closed-door sneaking surreptitious hush-hush under-the-table unavowed back-street undivulged huggermugger hole-and-corner backstair

3 秘密地

close underground backstage privily hugger-mugger subrosa

4 不公开

close closet occult undeclared closed-door