What 삜 means
It is one assembled block in Hangul, the Korean alphabet.
Hangul groups the letters for a syllable into one block: usually an initial consonant, a vowel, and sometimes a final consonant cluster. 삜 uses ㅃ, ㅣ, and ㄽ.
Before Hangul, Korean writing adapted Chinese characters through systems such as Idu, Hyangchal, and Gugyeol. King Sejong created Hangul in 1443; the book 훈민정음, published in 1446, explained the new letters' purpose and design. The Korean state made Hangul its official writing system in 1894.
How do I type 삜?
Use a Korean 2-set keyboard.
On the common Korean 2-set layout, switch to Korean input and press Shift+Q, then L, F, T. The input method assembles those letters as ㅃ + ㅣ + ㄹ + ㅅ; ㄹ + ㅅ form the final cluster ㄽ.
Fonts may draw the same block differently, but that change in shape does not make it a different character.
Questions people ask
1Why does 삜 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 삜
삜\C09CCodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.