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Etymology data from Wiktionary via Wiktextract (CC BY-SA 4.0). Chinese character data from the 說文解字, the Taiwan MOE 國語辭典簡編本 (CC BY-ND 3.0 TW) and HSK/TOCFL lists.

Explanations are written by a local model (gemma4) and only published after a verification pass against the cited sources. How it works.

Chinese

一

yī
one
  • Ideogram
  • HSK 1
  • TOCFL 1
  • radical 一
  • 1 strokes

Etymology graph

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  • derived
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  • meaning component
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Origin

The character 一 is an ideogram consisting of a single horizontal stroke to indicate the number one. According to the Shuowen Jiezi, in the beginning there was the Great Beginning, where the Way stood in one, dividing heaven and earth to create all things. The character has appeared in oracle, bronze, chu, qin, seal, and regular scripts.

It was inherited from Proto-Sino-Tibetan *ʔit, an etymon that accounts for most dialectal forms of "one" across Chinese language groups such as Mandarin, Wu, and Yue. In most Min varieties, the character is used for the colloquial reading of "one," though the origins of these specific forms remain unelucidated. They may be derived from 蜀 (shǔ), 隻 /只 (zhī), or 禃 (zhí). Additionally, the form may be a contraction of 一個 (yīgè).

Confidence: high · written by gemma4:26b, checked statement-by-statement against the sources below.

「一」是從原始漢藏語 *ʔit 繼承而來的。這個原始語根解釋了多數漢語方言中「一」的讀音，包括官話、晉語、贛語、客家語、徽語、湘語、粵語及吳語等。在部分閩語變體中，此字有不同的口語讀音，如福州、莆田、廈門、泉州、漳州及閩南地區的各種讀音。這些閩語讀音的起源尚不明確，可能與「蜀」、「隻／只」或「禃」有關，也有部分福建方言使用「個／个」或「寡」來表示「一」。

在某些語境下，「一」也被視為「一個」的縮寫。其字形屬於指事字，透過單一的橫劃來表達數量概念。

Confidence: high · written by gemma4:26b, checked statement-by-statement against the sources below.

Lineage

  • inheritedProto-Sino-Tibetan*ʔit

Words built on it: 大, 月, 日, 兩, 開, 一些, 一起, 女, 二, 門, 風, 一直

Wiktionary etymology text
Etymology 1

Ideogram (指事): a horizontal stroke, indicating the number “one”.

From Proto-Sino-Tibetan *ʔit. Descendants from the *ʔit etymon account for the majority of the dialectal forms for “one” in Chinese (Mandarin, Jin, Gan, Hakka, Hui, Xiang, Yue, Wu groups, etc.).

Etymology 3

Form used as the colloquial reading for “one” in most Min varieties: Fuzhou/Fuding suoʔ⁸, Fuqing θyo⁸, Gutian syøʔ⁸, Ningde søʔ⁸, Zhouning sɔʔ⁸, Putian ɬoʔ⁸, Xiamen/Quanzhou/Yongchun/Zhangzhou tsit̚⁸, Leizhou/Haikou ziak⁸, Longyan tse⁴, Youxi ɕie⁷, Jian'ou/Songxi tsi⁵, Jianyang tsi⁸. Whether all of the forms above are related and their origins remain unelucidated; they may be derived from 蜀 (shǔ) (cf. 獨 /独 (dú, “single, alone”); often written when read with the colloquial reading), 隻 /只 (zhī) (< *kV-tek) or 禃 (zhí). Some Fujian dialects use 個 /个 and 寡 (guǎ) for “one”.

Etymology 4

Contraction of 一個 /一个 (yīgè) (Zhou, 1998).

From Wiktionary, CC BY-SA 4.0.

Meanings

character
  1. one
  2. each; every
  3. single; alone
  4. whole; entire; all: throughout
  5. same; identical; uniform
  6. another; alternative

Shuowen Jiezi 說文解字

一：惟初太始，道立於一，造分天地，化成萬物。凡一之屬皆从一。

Xu Shen, c. 100 CE — the first analytical dictionary of Chinese characters.

國語辭典 definitions

  1. 自然數的開始。大寫作「壹」，阿拉伯數字作「1」。 例：一、二、三……
  2. 第一。 例：一等、一年級
  3. 單個。 例：一人、一心二用
  4. 相同、一致。 例：一模一樣、大小不一
  5. 全、滿、整。 例：一如既往、一身是膽、一體適用
  6. 才、剛剛。 例：天一亮，他就起床了。

© Ministry of Education, Taiwan — CC BY-ND 3.0 TW, shown unaltered.

How 一 was written 字形演變

  1. 一 in Oracle bone script
    Oracle bone
    甲骨文
    Shang, c. 1250–1050 BCE
  2. 一 in Bronze script
    Bronze
    金文
    Shang–Zhou
  3. 一 in Chu slips & silk script
    Chu slips & silk
    楚系簡帛
    Warring States
  4. 一 in Qin slips script
    Qin slips
    秦系簡牘
    Qin
  5. 一 in Small seal script
    Small seal
    說文小篆
    Shuowen, c. 100 CE
  6. 一 in Regular script
    Regular
    楷書
    since c. 200 CE

Historical forms collected by the legacy etymfun dataset; most characters have several attested variants.

Sources

  • etymagent (local gemma4:26b) — Generated
  • Structural decomposition (chaizi) — See upstream
  • Historical glyph forms (zdic.net 字形演变) — Rights unverified
  • HSK / TOCFL word lists — Facts (levels)
  • 教育部《國語辭典簡編本》 (Taiwan MOE) — CC BY-ND 3.0 TW
  • 說文解字 Shuowen Jiezi (Xu Shen, c. 100 CE) — Public domain
  • Written form — n/a
  • Wiktionary (via Wiktextract / kaikki.org) — CC BY-SA 4.0
  • Wiktionary: 一