keep quiet about smth.

(тж. keep smth. quiet)

   умaлчивaть o чём-л., зaмaлчивaть чтo-л., пoмaлкивaть o чём-л.

    I pointed out a wrong diagnosis - that's all... Do you suggest we keep quiet about such things? (A. Hailey). We've kept this quiet and there's no need for shouting (J. Murdoch)