Hangul syllable byaen

It has no fixed meaning alone; it is a Hangul syllable block.

Hangul groups letters called jamo into syllable blocks. Here, ㅂ starts the syllable, ㅒ supplies its vowel, and ㄴ closes it. The block has no dictionary meaning by itself; meaning comes from the Korean word that uses it.

The history of Hangul belongs to the writing system, not to this individual block. Its creation was recorded in 1443, and the completed system was published in 1446 so Korean speech could be written with combinable letters. Earlier Korean writing also used Chinese characters in systems called Idu, Hyangchal, and Gugyeol. Those are earlier writing practices, not ancestors of 뱬.

How do I type 뱬?

On the standard two-set Korean layout, type q, Shift+o, then s.

These keys enter ㅂ, ㅒ, and ㄴ in that order; the input method assembles them into one block. On a phone, select a Korean keyboard and enter the same letters; the exact key labels vary.

Unicode also represents the syllable in decomposed form as ᄇ + ᅤ + ᆫ. If text software keeps those letters separate, NFC normalization—a Unicode form that recombines Hangul syllables—can compose them into one block.