# 知己
## Chinese
### Pronunciation

* Mandarin
    (Pinyin): zhījǐ
    (Zhuyin): ㄓ ㄐㄧˇ
* Cantonese (Jyutping): zi$^1$ gei$^2$
* Hakka
    (Sixian, PFS): tî-kí
    (Hailu, HRS): di$^ˋ$ gi$^ˊ$
* Southern Min (Hokkien, POJ): ti-kí
* Mandarin
** (Standard Chinese)
*** Hanyu Pinyin: zhījǐ
*** Zhuyin: ㄓ ㄐㄧˇ
*** Tongyong Pinyin: jhihjǐ
*** Wade–Giles: chih$^1$-chi$^3$
*** Yale: jr̄-jǐ
*** Gwoyeu Romatzyh: jyjii
*** Palladius: чжицзи (čžiczi)
*** Sinological IPA : /ʈ͡ʂʐ̩⁵⁵ t͡ɕi²¹⁴⁻²¹⁽⁴⁾/
* Cantonese
** (Standard Cantonese, Guangzhou–Hong Kong)
*** Jyutping: zi$^1$ gei$^2$
*** Yale: jī géi
*** Cantonese Pinyin: dzi$^1$ gei$^2$
*** Guangdong Romanization: ji$^1$ géi$^2$
*** Sinological IPA : /t͡siː⁵⁵ kei̯³⁵/
* Hakka
** (Sixian, incl. Miaoli and Neipu)
*** Pha̍k-fa-sṳ: tî-kí
*** Hakka Romanization System: di$^ˊ$ gi$^ˋ$
*** Hagfa Pinyim: di$^1$ gi$^3$
*** Sinological IPA: /ti²⁴ ki³¹/
** (Hailu, incl. Zhudong)
*** Hakka Romanization System: di$^ˋ$ gi$^ˊ$
*** Sinological IPA: /ti⁵³ ki²⁴/
* Southern Min
** (Hokkien)
*** Pe̍h-ōe-jī: ti-kí
*** Tâi-lô: ti-kí
*** Phofsit Daibuun: di'kie
*** IPA (Xiamen): /ti⁴⁴⁻²² ki⁵³/
*** IPA (Quanzhou): /ti³³ ki⁵⁵⁴/
*** IPA (Zhangzhou): /ti⁴⁴⁻²² ki⁵³/
*** IPA (Taipei): /ti⁴⁴⁻³³ ki⁵³/
*** IPA (Kaohsiung): /ti⁴⁴⁻³³ ki⁴¹/
* Middle Chinese: trje kiX
Rime :
| Character | 知 | 己 |
| Reading # | 1/1 | 1/1 |
| Initial (聲) | 知 (9) | 見 (28) |
| Final (韻) | 支 (11) | 之 (19) |
| Tone (調) | Level (Ø) | Rising (X) |
| Openness (開合) | Open | Open |
| Division (等) | III | III |
| Fanqie | 陟移切 | 居里切 |
| Baxter | trje | kiX |
| Reconstructions |||
| Zhengzhang Shangfang | /ʈiᴇ/ | /kɨ$^X$/ |
| Pan Wuyun | /ʈiɛ/ | /kɨ$^X$/ |
| Shao Rongfen | /ȶjɛ/ | /kie$^X$/ |
| Edwin Pulleyblank | /ʈiə̆/ | /kɨ$^X$/ |
| Li Rong | /ȶie/ | /kiə$^X$/ |
| Wang Li | /ȶǐe/ | /kĭə$^X$/ |
| Bernhard Karlgren | /ȶie̯/ | /ki$^X$/ |
| Expected Mandarin Reflex | zhī | jǐ |
| Expected Cantonese Reflex | zi$^1$ | gei$^2$ |
* Old Chinese
    (Baxter–Sagart): /*tre k(r)əʔ/
    (Zhengzhang): /*ʔl'e kɯʔ/
Baxter–Sagart system 1.1 (2014) :
| Character | 知 | 己 |
| Reading # | 1/1 | 2/2 |
| Modern Beijing (Pinyin) | zhī | jǐ |
| Middle Chinese | ‹ trje › | ‹ ki$^X$ › |
| Old Chinese | /*tre/ | /*k(r)əʔ/ |
| English | know | self |
| Notes for Old Chinese notations in the Baxter–Sagart system: * Parentheses "" indicate uncertain presence; * Square brackets "" indicate uncertain identity, e.g. *[t] as coda may in fact be *-t or *-p; * Angle brackets "<>" indicate infix; * Hyphen "-" indicates morpheme boundary; * Period "." indicates syllable boundary. |||
Zhengzhang system (2003) :
| Character | 知 | 己 |
| Reading # | 1/1 | 1/1 |
| No. | 11495 | 5765 |
| Phonetic component | 矢 | 己 |
| Rime group | 支 | 之 |
| Rime subdivision | 0 | 0 |
| Corresponding MC rime | | |
| Old Chinese | /*ʔl'e/ | /*kɯʔ/ |
| Notes | 沈兼士依韻會所引說文從口矢聲 | |

### Noun

知己
* intimate friend; close friend
    From: 8th century, Gao Shi (高適), 別董大‧其一 "Farewell to Dong the Elder - I"
    Mò chóu qiánlù wú zhījǐ, tiānxià shéirén bù shí jūn. [Pinyin]
    Worry not that on the road ahead there'd be no close friend too! Under Heaven, who does not comprehend you?

#### Synonyms

* 友好 (yǒuhǎo)
* 同袍 (tóngpáo) (literary)
* 執友 / 执友 (zhíyǒu) (literary)
* 好友 (hǎoyǒu)
* 相知 (xiāngzhī)
* 知交 (zhījiāo)
* 知友 (zhīyǒu)
* 知心 (zhīxīn)
* 知心朋友 (zhīxīn péngyou)
* 知言 (zhīyán) (literary)
* 知遇 (zhīyù) (literary)
* 知音 (zhīyīn)
* 良朋 (liángpéng) (literary)
* 良知 (liángzhī)
* 高朋 (gāopéng) (literary)
* 齒輪 / 齿轮 (ci$^3$ nen$^2$) (Sichuanese)

#### Derived terms

* 叨在知己
* 天涯知己
* 紅粉知己 / 红粉知己
* 酒逢知己千杯少，話不投機半句多 / 酒逢知己千杯少，话不投机半句多 (jiǔ féng zhījǐ qiān bēi shào, huà bù tóujī bàn jù duō)
* 風塵知己 / 风尘知己

### Verb

知己
* (literary) to know oneself; to be intimate with oneself
* (Zhangzhou Hokkien) to be aware of one's duty

#### Derived terms

* 士為知己者死 / 士为知己者死 (shì wèi zhījǐ zhě sǐ)
* 知己知彼 (zhījǐzhībǐ)
* 知己話 / 知己话
* 知彼知己 (zhībǐzhījǐ)

### Descendants

* → Japanese: 知己(ちき) (chiki)
* → Korean: 지기(知己) (jigi)
* → Vietnamese: tri kỉ (知己)

## Japanese

Kanji in this term :
| 知 | 己 |
| ち Grade: 2 | き Grade: 6 |
| on'yomi ||

### Pronunciation

* (Tokyo) ちき [chíꜜkì] (Atamadaka –)
* (Tokyo) ちき [chìkíꜜ] (Odaka – [2])
* IPA: [t͡ɕikʲi]

### Noun

知(ち)己(き) • (chiki)
* close friend

### References

* 1 2 Matsumura, Akira, editor (2006), 大辞林 [Daijirin] (in Japanese), Third edition, Tokyo: Sanseidō, →ISBN

## Vietnamese

chữ Hán Nôm in this term :
| 知 | 己 |

### Noun

知己
* chữ Hán form of tri kỉ (“bosom friend”).

### Verb

知己
* chữ Hán form of tri kỉ (“to confide, to open one's heart”).