隐私(yǐn sī) - privacy; private matters in Mandarin

在zài网wǎng上shàng要yào保bǎo护hù好hǎo自zì己jǐ的de隐yǐn私sī。

You need to protect your privacy online.

别bié看kàn我wǒ的de手shǒu机jī，这zhè是shì我wǒ的de隐yǐn私sī。

Don't look at my phone. That's private.

很hěn多duō人rén担dān心xīn软ruǎn件jiàn会huì泄xiè露lù他tā们men的de隐yǐn私sī。

Many people worry that apps will leak their private information.

问wèn别bié人rén的de工gōng资zī是shì不bu是shì不bú太tài礼lǐ貌mào？那nà是shì隐yǐn私sī。

Isn't it rude to ask people what they earn? That's private.

这zhè家jiā公gōng司sī说shuō会huì保bǎo护hù用yòng户hù的de隐yǐn私sī。

This company says it will protect users' privacy.