xiè lù
to leak (information)
to divulge
also pr. [xie4 lou4]
xiè lù tiān jī
to divulge the will of heaven (idiom); to leak a secret
to let the cat out of the bag
tiān jī bù kě xiè lù
lit. mysteries of heaven must not be revealed (idiom); must not be revealed
I am not at liberty to inform you.