He was told to keep mum about the surprise party
She decided to keep mum and not reveal the secret
The suspect was advised by his lawyer to keep mum
They promised to keep mum until the official announcement
When asked about the investigation, the spokesperson kept mum
It's best to keep mum if you don't have anything constructive to say
The children were urged to keep mum about their adventure
He's usually quite chatty, but today he's keeping mum
The witness was instructed to keep mum about what she saw
If you want to avoid trouble, just keep mum
Did you hear the secret about the party?
Yes, but I will keep mum about it.
Good, let's not tell anyone else.
She was told to keep mum about the surprise party
She was told to stay silent about the surprise party
She was instructed to say nothing about the surprise party