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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 (Hangeul), “‘Great script, Korean script’”) in South Korea and 조선글 (Chosŏn'gŭl), “‘Korean script’”) in North Korea.
- 디귿 (digeut), a letter of the Korean writing system, hangeul; the unaspirated alveolar plosive (IPA: /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)
- ㅌ (t)
- ㄸ (tt)
- ㄴ (n) (in Ledyard account)
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