What 랙 means
It means lag: an input or response arrives late.
Players distinguish that delay from a low frame rate.
How is the Hangul block formed?
Three Hangul letters form one syllable block.
Hangul's creation is recorded in 1443; King Sejong sought an easier way to write Korean. The explanatory guide, Hunminjeongeum Haerye, appeared in 1446.
Here, ㄹ is the initial consonant, ㅐ the vowel, and ㄱ the final consonant; fonts may arrange them differently.
Don't confuse it with
1Combination ideas
1A Korean gamer says lag is occurring.
Questions people ask
1Why does 랙 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 랙
Windows (Word)
Alt+XType B799, then Alt+X to get 랙.
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 raeg”.
Linux
Ctrl+Shift+UType b799, then Enter or Space.
HTML
랙CSS
\B799type 랙 on a Korean keyboard
With a Korean layout active, enter ㄹ, ㅐ, ㄱ in order; the input method combines them.
Codes and encoding1 code points
HTML decimal
랙
HTML hex
랙
CSS content
content: "\B799";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%EB%9E%99
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.