keep a secret

She had kept the secret from her own four children for years.

They went back two days later, having kept the secret to themselves.

So we're going to keep a few things a little secret.

And they would have to be kept a secret from everyone until then.

Three may keep a secret, if two of them are dead.

The plan works, although she is told to keep her services a secret.

Each was told to keep the news a secret from the others.

Two can keep a secret, if one of them is dead.

Well then, you may tell her if she can keep a secret.

But the way to keep a secret is not to tell anyone.