Radical 13

冂
冂
冂 (U+5182) "wide"
Pronunciations
Pinyin:	jiōng
Bopomofo:	ㄐㄩㄥ
Gwoyeu Romatzyh:	jiong
Wade–Giles:	chiung1
Cantonese Yale:	gwing2
Jyutping:	gwing1
Pe̍h-ōe-jī:	keng
Japanese Kana:	ケイ kē (on'yomi)
Sino-Korean:	경 gyeong
Names
Chinese name(s):	同字框 tóngzìkuàng
Japanese name(s):	冏構/けいがまえ kēgamae; 牧構/まきがまえ makigamae; 同構/どうがまえ dōgamae; 円構/えんがまえ engamae
Hangul:	멀 meol
Stroke order animation

Radical 13 or radical down box (冂部), meaning upside-down box or wide, is one of 23 of the 214 Kangxi radicals that are composed of 2 strokes.

In the Kangxi Dictionary, there are 50 characters (out of 49,030) to be found under this radical.

冂 is also the 10th indexing component in the Table of Indexing Chinese Character Components predominantly adopted by Simplified Chinese dictionaries published in mainland China.

Evolution

Strokes	Characters
+0	冂
+2	冃冄 (=冉) 内^SC/JP (=內 -> 入) 円^JP (=圓 -> 囗) 冇冈 (SC form of 岡 -> 山 / ancient variant of 网 -> 网)
+3	冉冊^{TC/JP/KO variant} 冋册^{SC variant} (=冊) 囘 (=回 -> 囗)
+4	再冎
+5	冏
+6	冐
+7	冑冒
+8	冓冔
+9	冕

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.
Leyi Li: “Tracing the Roots of Chinese Characters: 500 Cases”. Beijing 1993, ISBN 978-7-5619-0204-2
KangXi: page 128, character 30
Dai Kanwa Jiten: character 1506
Dae Jaweon: page 289, character 9
Hanyu Da Zidian: volume 1, page 96, character 13