简体

keep it under lock and key
守口如瓶

Quote

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Definition

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keep secret, don’t tell anyone

2. Use - Learn how the slang is used.

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Do you keep a diary? Do you write all your most secret and private thoughts in it? What do you do so that no one else will read your diary? Maybe you hide it away in a secret place. Or, even better, maybe you buy a special tiny lock and key for it. If you keep your diary under lock and key, no one else will be able to open it.

Of course, some secrets you never actually write down. Maybe your best friend tells you something that she doesn’t want anyone else to know about. She tells you that she’ll trust you with her secret, as long as you promise to keep it under lock and key. You’re not literally going to lock it up anywhere, but you’ll keep it to yourself, as if the secret were actually locked away.

Pop singer Joe Jonas knows that his many fans are excited to hear his new album. And he’s excited about sharing the music with them, but not until the time is right. Until the album is ready to be released to the public, he’s going to keep it under lock and key.

Are you good at keeping secrets? What do you do when you have a secret that you want kept under lock and key?

Examples

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“Okay, I’ll tell you what happened on my date, but you have to keep it under lock and key. Don’t tell anyone!”

“My teacher always keeps the essay topic under lock and key until the day of the exam.”

“The army commander knows what really happened during the battle, but he’s keeping it under lock and key.”