英和和英

to expose a secret

to disclose a secret―divulge a secret―reveal a secret

to disclose a secret to one―reveal a secret to one―divulge a secret to one―confide a secret to one―unbosom oneself of a secret to one―unburden one's heart of a secret to one―let one into the secret

to divulge a secret―blab a secret―let out a secret―let the cat out of the bag

betray a confidence

to keep something a secret

The matter must be kept secret

matter or event defined by evaluation (secret matter)

spy out a secret

to observe strict secrecy

take the wraps off

to keep the matter a secret

the act of keeping something a secret

disclose a secret

to clear up a mystery

in secrecy

in secrecy

to clear up a mystery

to swear one to secrecy―bind one to secrecy

backstairs intimacies

an open secret

to swear secrecy―vow secrecy―pledge oneself to secrecy―bind oneself to secrecy

keep it dark

Let the cat out of the bag.

pass on stealthily

to keep the matter （a） secret―preserve secrecy

pierce a mystery

babble (out) a secret

of something, the state of being a secret

to be able to expose a secret