背 地 風 bèi dì fēng : behind somebody's back; privately; on the sly

個 體 戶 gè tǐ hù : a small private business (used in mainland China only)

密 室 mì shì : cell; private room

密 談 mì tán : commune; private discussion

塾 shú : private tutorage

Big5: , Unicode: 587e (塾),
Links: MT, Cantonese, Ld, Chinese Language

私 «厶» sī : personal; private; selfish

Big5: , Unicode: 79c1 (私),
Links: MT, Cantonese, Ld, Chinese Language

私 人 sī rén : private (citizen); private

私 人 鑰 匙 sī rén yào shi : private key (in encryption)

私 下 sī xià : in private

私 營 sī yíng : privately-owned; private