保密maintain secrecy; keep sth secret; keep confidential;classify
這事要絕對～。This must be kept absolutely secret.or:This is strictly confidential.or:This is a top secret./你放心好了，我一定為你～。You don’t have to worry. I’ll keep my mouth shut./解除～declassification/～電話secure telephone/～文件classified document/～觀念強security-conscious |