How to say "一定是什么难以启齿的事情" (yí dìng shì shén me nán yǐ qǐ chǐ de shì qíng) in Chinese dialogue

dìngshìshénmenánchǐ齿deshìqíng

It must have been something deeply shameful.

Idioms & Colloquial Expressions
Grammar Patterns
INTERACTIVE SCRIPT TIMELINE
LINE 0123:06
yòu
ràng
hán
wèi
shǒu
wèi
jiǎo
de

and left Han Ji walking on eggshells.

LINE 0223:09
PLAYING SCENE
dìng
shì
shén
me
nán
chǐ齿
de
shì
qíng

It must have been something deeply shameful.

LINE 0323:11
tīng
shuō

I heard

Show Information
Source MediaTV Series
Season & EpisodeS2 E23
Timestamp23:09
TMDB ID124595