mysterious about something

She was mysterious about herself but had plenty to say on the subject of her boyfriends.

You could be a little less mysterious about what's going on here.

There is something vaguely illicit and mysterious about the Met after dark.

I can't imagine why he had to be so mysterious about it all.

But she wouldn't say and was quite mysterious about it.

And why was he so mysterious about all his relatives?

She had taken to being very mysterious about her doings of late.

"The truth is that Jesus was a bit mysterious about his identity, wasn't he?"

I can't understand why they would be so mysterious about it.

"Well, I don't think we need be mysterious about it," she said.