天机不可泄露

Traditional (Taiwan): 天機不可泄露

tiānjībùkěxièlù ㄊㄧㄢ ㄐㄧ ㄅㄨˋ ㄎㄜˇ ㄒㄧㄝˋ ㄌㄨˋ

    • lit. mysteries of heaven must not be revealed (idiom) must not be revealed
    • I am not at liberty to inform you.

Character by character

Saying俗语俗語

Proverb谚语諺語 · In everyday use

Literally
heaven's secret must not be leaked
Meaning
Originally, heaven's plans must not be revealed to mortals; now, a secret must not be disclosed. Often said half-jokingly to avoid answering.

Sources