Grammar fix

keep a secret

not tell

to not tell anyone information that someone has asked you to keep private.

collocationB1common

Hear it in context

Notice where the phrase sounds natural.

Can you keep a secret? I have something important to tell you.daily life
If a friend trusts me, I always try to keep their secrets because I think honesty and trust are important in relationships.IELTS speaking

Pattern: keep a/the/my/your secret

WrongCan you hold a secret?

RightCan you keep a secret?

You KEEP a secret — not 'hold' one.

Patternkeep a/the/my/your secret

Choose the version that sounds natural in speech.

Stiff I shall maintain the confidentiality of this information.

Natural I'll keep it a secret. / I won't tell anyone.

'Keep a secret' is natural; 'maintain confidentiality of information' is corporate.

Words that usually travel with it.

Do not confuse with 'tell a secret,' which means to share private information.