これは秘密。の英語

This is a secret.

It's secret.

It's a secret.

This is a secret.

It's secret.

It is an open secret.

This is confidential mind.

I'll keep it a secret.

This information is confidential.

keep it dark

Keep the secret.

That is classified information.

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

in secrecy

Is it a secret?

My lips are sealed.

Mind you, this is a secret.

take the wraps off

kept secret

of something, the state of being a secret

the state of something being secret

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

to disclose a secret―divulge a secret―reveal a secret―give away the secret

That is being hidden in a hidden place.

to keep the matter a secret

an open secret

Is it a secret?

Let the cat out of the bag.

The secret is [has got] out.

to keep the matter （a） secret―preserve secrecy