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凵

cjk compatibility ideograph-2f81d

CJK Compatibility Ideograph 2F81D

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凵 is a text-encoding variant, not a separate everyday word. It preserves a Taiwan CNS 11643 source distinction; its Unicode normalization mapping leads to 凵, while the source record also links to 𠙴.

Text symbol

What 凵 means

It is a conversion form, not a separate everyday word.

Shuowen Jiezi, an early Chinese dictionary, glosses 凵 as an open mouth; Chinese character histories also link it to a hollow and 坎 (“pit”). These readings describe 凵, not 凵 itself.

The compatibility supplement preserves round-trip conversion with Taiwan’s CNS 11643-1992 standard.

Why does Unicode link 凵 to both 凵 and 𠙴?

They mark separate source and normalization links.

Unicode 18.0 links 凵’s Taiwan source glyph to 𠙴, while its normalization mapping remains 凵. This records a source distinction, not interchangeable word meanings.

Unicode normalization can reduce 凵 to 凵, erasing the exact encoded distinction.

Who writes 凵

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Questions people ask

1

Why does 凵 show as a box on some devices?

Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.

How to type or find 凵

Search it as
凵 · 𠙴 · CNS 11643 · Unicode normalization
Shows up in
Anything that takes text · its shape is whatever your font draws
Windows (Word)
⎇Alt+XType 2F81D, then AltX to get 凵.
Windows
⊞Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win .).
macOS
⌃Control+⌘Command+␣SpaceOpen the character viewer and search “cjk compatibility ideograph-2f81d”.
Linux
⎈Ctrl+⇧Shift+UType 2f81d, then Enter or Space.
HTML
凵
CSS
\2F81D
Codes and encoding1 code points
HTML decimal
凵
HTML hex
凵
CSS content
content: "\2F81D";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%F0%AF%A0%9D
1
On screen
1
Code points
2
JS .length
4
UTF-8 bytes

A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

Families this belongs to

2

Chinese characters99,354 symbols

Chinese, Japanese & Korean121,370 symbols