How to say "缄口不言" (jiān kǒu bù yán) in Chinese dialogue

jiānkǒuyán

and say nothing.

Grammar Patterns
INTERACTIVE SCRIPT TIMELINE
LINE 0122:07
shì
ér
jiàn

To see nothing,

LINE 0222:08
PLAYING SCENE
jiān
kǒu
yán

and say nothing.

LINE 0322:11
dìng
shì

They must have

Show Information
Source MediaTV Series
Season & EpisodeS1 E23
Timestamp22:08
TMDB ID289209