nán​yán​zhī​yǐn

embarrassing illness

难言之隐 (難言之隱) nán​yán​zhī​yǐn
embarrassing illness idiom
a private or embarrassing medical condition or ailment
hidden trouble idiom
a hidden trouble or something too embarrassing to mention

Frequency

Movie subtitles
0.450 per million appears in 0% of films
Written text
0.621 per million

Sources

Definitions
CC-CEDICT