Hangul syllable ddalg

It functions as one syllable in Korean spelling.

Hangul groups individual Korean letters, called jamo, into syllable blocks. 딹 combines tense ㄸ (jamo ᄄ), vowel ㅏ (jamo ᅡ), and final ㄺ (jamo ᆰ), a cluster of ㄹ plus ㄱ. Unicode's name writes it ddalg; Revised Romanization writes ttalg. The final cluster's pronunciation follows Korean sound rules and can change with what comes next.

Hangul's earliest secure records appear around 1443, and its explanatory manuscript, Hunminjeongeum, was completed in 1446. The script was designed to represent Korean more directly with letters. That history explains the block's design, not a separate meaning for 딹.

What did Korean writing use before Hangul?

Writers used Chinese characters and adapted systems such as Idu.

Hanja are Chinese characters used in Korean writing; Idu adapted them to represent Korean words and grammar. Hangul instead uses letters for Korean sounds, arranged into syllable blocks. Idu is a predecessor in the history of writing Korean, not the source of 딹's particular shape.

From 1894–1945, reforms and Japanese colonial rule changed Hangul's place in public life. After 1945, the script regained public standing. Those changes belong to Hangul as a writing system, not to this isolated syllable.