Hangul syllable Ddyuj

It is a Korean spelling unit built from Hangul letters. Hangul joins letters called jamo into syllable blocks. In 뜢, ᄄ is the initial, ᅲ the vowel, and ᆽ the final.

Text normalization may split this one-piece block into three letters: the spelling stays the same, but software can compare the text sequences differently.

Hangul was devised under King Sejong in 1443; the 1446 book Hunminjeongeum explains its design. It gave Korean its own script alongside Chinese-character methods such as Idu, Gugyeol, and Hyangchal. Its use spread through Buddhist, Confucian, everyday, and literary writing. It became Korea's official writing system in 1894, losing that status under Japanese rule in 1910. A possible Mongolian Phags-pa influence remains debated.