nán​yǐ​qǐ​chǐ

too embarrassed

难以启齿 (難以啟齒) nán​yǐ​qǐ​chǐ
too embarrassed adverb
to find it hard or embarrassing to speak about something, often due to shame or sensitivity

觉得私事难以启齿

jué​de zhè jiàn sī​shì ràng nán​yǐ​qǐ​chǐ.

He found this private matter hard to talk about.

Frequency

Movie subtitles
2.24 per million appears in 1% of films
Written text
0.590 per million

Sources

Definitions
CC-CEDICT