3.16Usage: +++

己 jǐ
Not to be confused with 已

Oneself

知己 (zhī jǐ) Soulmate Literal. Know oneself – widely used to describe someone who truly understands oneself
知己知彼 (zhī jǐ zhī bǐ) Know oneself (yourself), know your opponent – popular quote from Art of War by Sun Zi (孙子兵法)

+ A LITTLE MORE +

损人利己 (sǔn rén lì jǐ) Harming others for personal gains             *Literal. Cause damage to people; beneficial for oneself*

利人利己 (lì rén lì jǐ) A win-win situation Literal. Beneficial for people; beneficial for oneself
求人不如求己 (qiú rén bù rú qiú jǐ) Doing something personally is better than going around in vain to seek help Literal. Beg (implore) people is not as good as to beg (implore) oneself

+ SIMILAR CHARACTERS +

讠 Speech Radical + 己 = 记 (jì) Note
- 记得 (jì dè) Remember
- 记事本 (jì shì bén) Notebook
纟 Silk Radical + 己 = 纪 (jì) Document
- 纪录片 (jì lù piàn) Documentary
心 Heart Radical + 己 = 忌 (jì) Avoid / Envious
走 Walk Radical + 己 = 起 (qǐ) Raise
木 Wood Radical + 己 = 杞 (qǐ) Lycium tree
- 枸杞 (gǒu qǐ) Goji berry