What 땟 means
The surrounding word supplies the meaning. 땟국 means grime; 땟물 and 땟자국 are related compounds. Its final ㅅ is 사이시옷, a spelling ㅅ used in some Korean compounds.
How is this block formed?
It follows Hangul's system for building syllable blocks.
Hangul's first record dates to 1443; an explanatory book appeared in 1446, describing blocks made from initial, middle, and final sounds. Scholars connect their square layout with Chinese-character writing.
Don't confuse it with
2Questions people ask
1Why does 땟 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 땟
Windows (Word)
Alt+XType B55F, then Alt+X to get 땟.
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 “hangul syllable ddaes”.
Linux
Ctrl+Shift+UType b55f, then Enter or Space.
HTML
땟CSS
\B55FKorean IME
Enter `ㄸ`, `ㅐ`, `ㅅ` in that order; the Korean input method composes `땟`.
Codes and encoding1 code points
HTML decimal
땟
HTML hex
땟
CSS content
content: "\B55F";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%EB%95%9F
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.