The traditional account* states that ㄷ d is derived from ㄴ n by the addition of a stroke (ㄴ而ㄷ […] 其因聲加畫). However, Gari Ledyard proposes instead that ㄷ d is borrowed from Phagspa d, ultimately from Tibetan ད d, and that it is ㄴ n which is derived by the removal of a stroke.
* Hunmin Jeongeum Haerye “Explanations and Examples of the Proper Sounds for the Instruction of the People” (1446), defining and explaining the script now known as 한글 (han-geul, “Great script, Korean script”) in South Korea and 조선글 (joseon-geul, “Korean script”) in North Korea.
ㄷ • (d)
- 디귿 (digeut, “digeut”), a letter of the Korean writing system, hangeul; the unaspirated alveolar plosive (/t/)
In the North Korean order, ㄷ (d) it is the third jamo. In the South Korean order, it is the fourth.
- Previous jamo: ㄴ (n)
- Next jamo: (South Korean) ㄸ (tt), (North Korean) ㄹ (r)
- Other coronal consonants in Hangeul: ㄴ (n), ㅌ (t), ㄹ (r), ㄸ (tt)
- Other consonants with firm contact in Hangeul: ㅂ (b), ㄱ (g), ㅈ (j)