Word: 知己 (zhījǐ) 知己 dictionary entry zhījǐ to know oneself; to be intimate or close; intimate friend Full dictionary entry for 知己 Example sentences using 知己 2 sentences, showing page 1 of 1. 人生中能有一个知己，真不容易。 Rénshēng zhōng néng yǒu yí gè zhījǐ, zhēn bù róngyì. It really isn't easy to have a true friend in life. 找到知己很难，你很幸运！ Zhǎodào zhījǐ hěn nán, nǐ hěn xìngyùn! It's hard to find a true friend, so you're lucky!