What 깉 means
It is a syllable block; the Korean word around it supplies meaning. Its visible pieces ㄱ, ㅣ, and ㅌ are the starting consonant, vowel, and final consonant. Hangul, the Korean writing system, arranges consonants and vowels into compact syllable blocks.
King Sejong created Hangul in 1443, first calling it Hunminjeongeum, as an easier-to-learn way to write Korean. Before that, writers adapted Chinese characters to represent Korean through systems such as Idu, Gugyeol, and Hyangchal. An explanatory book with the same title appeared in 1446; Hangul gained official national recognition in 1894.
Questions people ask
1Why does 깉 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 깉
깉\AE49Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.