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The traditional account[1] holds that its form is the outline of an incisor, 齒形 (it is the shape of the four teeth in the Chinese pictographic character for incisor, 齒).

Gari Ledyard proposes that (s) was derived from (j) by removing the top stroke.


  • IPA(key): /s/
  • Actual realisation:
    (between vowels) IPA(key): [s]
    (before /i/ or /j/) IPA(key): [s]
    (before stops, or word-finally) IPA(key): [t̚]
    (before nasals) IPA(key): [n]
  • (file)



  1. 시옷 (siot, “siot”), a jamo (letter) of the alphabet of the Korean writing system, hangeul; the sibilant phoneme (/s/)

Usage notesEdit

In the North Korean order, (s) is the seventh jamo, and in the South Korean order the tenth.

Derived termsEdit

  • (j) (in traditional account)
  • (ch)
Coordinate terms


-- (-s-)

  1. The sai-siot (사이시옷), genitive marker sometimes placed between a vowel-final syllable of the first constituent and a syllable of the second constituent when forming compounds.
    1. 햇빛 (haetbit, “sunlight”) - from (hae, “sun”) + ㅅ + (bit, “light”)
    2. 고춧가루 (gochutgaru, “chili pepper flakes”) - from 고추 (gochu, “chili pepper”) + ㅅ + 가루 (garu, “powder, flour”)
    3. 어젯밤 (eojetbam, “last night”) - from 어제 (eoje, “yesterday”) + ㅅ + (bam, “night”)
    4. 나뭇잎 (namunnip, “tree leaf”) - from 나무 (namu, “tree”) + ㅅ + (ip, “leaf”)


  1. ^ 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.