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一
一
一 (U+4E00) "one"
Pronunciations
Pinyin:	yī
Bopomofo:	一
Gwoyeu Romatzyh:	i
Wade–Giles:	i1
Cantonese Yale:	yāt
Jyutping:	jat1
Pe̍h-ōe-jī:	it
Japanese Kana:	イチ ichi (on'yomi); ひと(つ) hito(tsu) (kun'yomi)
Sino-Korean:	일 il
Hán-Việt:	一 nhất
Names
Chinese name(s):	橫/横 héng
Japanese name(s):	一 ichi
Hangul:	한 han
Stroke order animation

Radical 1 or radical one (一部) meaning "one" is one of the 6 Kangxi radicals (214 radicals in total) composed of 1 stroke. It is the simplest Chinese character in the language due to consisting of only one line.

In the Kangxi Dictionary, there are 60 characters (out of 47,043) to be found under this radical.^[1]

一 is also the 1st indexing component in the Table of Indexing Chinese Character Components predominantly adopted by Simplified Chinese dictionaries published in mainland China.

Evolution

Large seal script character
Small seal script character

Derived characters

Some Chinese characters with Radical 1

Strokes	Characters^[a]
+0	一
+1	丁丂七丄丅丆
+2	万 (also SC/JP form of 萬 -> 艸) 丈三上下丌与^SC/与^JP (also SC/JP form of 與 -> 臼)
+3	不丏丐丑^SC/JP/丑^TC (also SC form of 醜 -> 酉) 丒 (=丑) 专^SC (=專 -> 寸)
+4	且丕世丘丙业^SC (=業 -> 木) 丛^SC (=叢 => 又) 东^SC (=東 -> 木) 丝^SC (=絲 -> 糸)
+5	丞丟丠両^JP (=兩 -> 入)
+6	丣两^SC (=兩 -> 入) 严^SC (=嚴 -> 口)
+7	並丧^SC (=喪 -> 口)

In calligraphy

The only stroke in radical one, known as 橫/横 héng "horizontal", is called 策 cè in the eight principles of the character 永 (永字八法 Yǒngzì Bāfǎ) which are the basis of Chinese calligraphy.

Sinogram

As an isolated character it is one of the Kyōiku kanji or Kanji taught in elementary school in Japan.^[2] It is a first grade kanji.^[2]

References

^ "️一部：一丁丂𠀀七丄丅万丈三上下丌𠀃不与丏丐丑𠀇𠀈且丕世𠀍丘㐀丙𠀓㐁丞丟𠀘𠀙𠀚丠丣𠀡𠀦𠀢". kangxizidian.com. Retrieved 2023-03-28.
^ ^a ^b "The Kyoiku Kanji (教育漢字) - Kanshudo". www.kanshudo.com. Archived from the original on March 24, 2022. Retrieved 2023-05-06.

"Dictionary -> Characters containing component "一"". Chinese Text Project. Retrieved 2022-02-10.

Literature

Fazzioli, Edoardo (1987). Chinese calligraphy : from pictograph to ideogram : the history of 214 essential Chinese/Japanese characters. calligraphy by Rebecca Hon Ko. New York: Abbeville Press. ISBN 0-89659-774-1.
Li, Leyi (1993). Tracing the Roots of Chinese Characters: 500 Cases. Beijing. ISBN 978-7-5619-0204-2.{{cite book}}: CS1 maint: location missing publisher (link)