How to say "此事对外绝口不提" (cǐ shì duì wài jué kǒu bù tí) in Chinese dialogue

shìduìwàijuékǒu

that I never speak of this to outsiders.

Idioms & Colloquial Expressions
Grammar Patterns
INTERACTIVE SCRIPT TIMELINE
LINE 0112:58
yāo
qiú

He demanded

LINE 0212:59
PLAYING SCENE
shì
duì
wài
jué
kǒu

that I never speak of this to outsiders.

LINE 0313:01
shì

And secondly,

Show Information
Source MediaTV Series
Season & EpisodeS2 E10
Timestamp12:59
TMDB ID124595