人不知鬼不觉 (人不知鬼不覺) rén bùzhī guǐ bùjué

rén bùzhī guǐ bùjué set phrase in absolute secrecy
Domain: Modern Chinese 现代汉语
Notes: (CC-CEDICT '人不知鬼不覺')

Word is mentioned most frequently in

Truncated for common words