What 쀋 means
쀋 is one written Korean syllable, assembled in a Hangul block.
Korean syllable 쀋 is made from an initial consonant jamo ᄈ, a vowel jamo ᅰ, and a final consonant jamo ᆮ. Jamo are the letters Hangul combines to build syllable blocks.
The royal text 훈민정음 (an explanation of the script) presents Hangul as designed around Korean sounds and grammar and intended to make literacy easier; it also describes communication with neighboring languages. A Unicode release date marks encoding, not the first appearance of a syllable in writing.
What if someone sends 쀋 alone?
A one-syllable message is too little to identify its intent.
It may be a fragment of Korean text rather than a complete message. Ask for the surrounding word or sentence before assigning it a tone or intent.
Neutral as part of Korean writing; opaque alone without the surrounding text.
Don't assign a reaction to it without the surrounding Korean text.
What it means when someone sends it to you
2 readingsQuestions people ask
1Why does 쀋 sometimes display as separate letters?
It can be the same syllable stored as decomposed jamo, 쀋. Software that normalizes and shapes Hangul can display that sequence as 쀋; without that handling or a Hangul-capable font, the letters may remain separate.
How to type 쀋
쀋\C00BCodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.