(secret) to be revealed or exposed, be solved (of a problem or mystery)

fortune to take a favorable turn

a knot to be untied

secret be disclosed

be exposed, be unmasked, a secret to be let out

have a weakness revealed

the mouth to become open, to become foul-mouthed or abusive

a mystery be unravelled

for a conversation to kick off

court session starts for case hearing

for one's fortunes to change

rain to stop

come into senses