Hangul Syllable Eud

It is a Korean syllable block made from three parts.

ㅇ, ㅡ and ㄷ fill its initial, vowel and final positions.

King Sejong devised Hangul in 1443 for Korean speech, which Chinese characters could not represent well; the 1446 book Hunminjeongeum explains the script. In South Korea, ㄷ is called 디귿, recorded in the 1527 spelling guide Hunmongjahoe; 1933 rules kept this traditional name, while North Korea uses the more regular 디읃. A 1998 Central Korean dialect account writes 읃:다 for standard 얻다 (“to get”): first-syllable ㅓ shifts to long ㅡ, marked by the colon.