Hangul syllable Dweob

It contributes one Korean syllable; the surrounding text gives the meaning.

둽 combines three Korean jamo—letters that form a syllable block: ᄃ at the start, ᅯ as the vowel, and ᆸ at the end. The last part of the English Unicode name, “Dweob,” is built from the names of those letters; it describes the construction, not a Korean word’s meaning.

Hangul was created in 1443, and its design was explained in 1446 in Hunminjeongeum, a text introducing the writing system. It was designed to make Korean writing easier than Chinese-character-based methods used before Hangul, including Idu, Gugyeol, and Hyangchal, which adapted Chinese characters to write Korean. After its creation, Buddhist and Confucian texts used Hangul; later practical printed material helped spread knowledge.

someone sent me 둽—what does it mean?

Alone, 둽 gives you one syllable, not a complete message.

Treat an isolated 둽 as text first. The block alone cannot tell you whether the sender meant a typo, a test, or a fragment of a Korean word. If they expect a translation, ask for the surrounding Korean text.