Hangul syllable byolt

It is one Korean syllable, not a complete message by itself. A Hangul block joins an initial consonant and a vowel, sometimes with a final consonant; the word or sentence gives the syllable its reading. Unicode 17.0's Hangul chart uses sample shapes, so fonts on different devices can draw it differently.

Hangul was created to make Korean easier to write, since Chinese characters did not fit the language's sounds and grammar well. Hunminjeongeum, the book that explained the new writing system, appeared in 1446. Hangul later became the native writing system for Korean.

Someone sent me 뵱—what does it mean?

Ask what word it belongs to. A lone syllable does not tell you the sender's tone or intent; the surrounding Korean text does.