知己

• ピンイン: zhī jǐ
• 漢字の分解: 知 = 矢 + 口 (arrow + mouth — knowledge that hits the mark); 己 = oneself

意味

知己（親友・心の友）

A classical literary term expressing the deepest friendship. 知己知彼 (know yourself and know your enemy) is a famous phrase from Sun Tzu. 红颜知己 refers to a close female confidant. Implies rare, profound mutual understanding.

例文

1. 人生得一知己足矣，斯世当以同怀视之。
2. 他们相识多年，早已成为彼此的知己好友。
3. 在茫茫人海中遇到一个真正的知己并不容易。

使い方ガイド

場面: friendship, literature, personal

トーン: warm

正しい言い方

• 他是我多年的知己，无话不谈，彼此信任。(He has been my bosom friend for many years — we talk about everything and trust each other.)
• 人生难得有知己，要好好珍惜这份情谊。(It is rare in life to have a true confidant — one must cherish this friendship.)

避ける言い方

• 我有很多知己 — 知己 implies rare, deep connection; having many would dilute the meaning; use 好朋友 for multiple close friends

起源と歴史

知 (know/understand) + 己 (oneself) — one who knows you as you know yourself

文化的背景

世代: All ages

社会的背景: Universal