close-mouthed

And maybe it will become easier for the next generation of fellow close-mouthed colleagues to find their voices.

Seeing what friends we have been, I ain't taking it very kindly because you have been so mighty close-mouthed.

I'm a close-mouthed woman, and know how to hold my tongue, which there ain't many females can say the same.

I can tell you no more than I have said already; for it is our duty to be close-mouthed, whether anything depends on it or not.

Having lived with him for eleven years, she had become somewhat close-mouthed like himself.

I was hurt at this, because every body knows how close mouthed I am.