Hangul Syllable Soem

It is one syllable; context supplies the word meaning.

쇰 is one Hangul syllable block, built from ᄉ, the initial consonant; ᅬ, the vowel; and ᆷ, the final consonant. These jamo, or Hangul building-block letters, form one syllable whose word meaning comes from the Korean word it belongs to.

Hangul was announced in late 1443 or early 1444 and officially published in 1446 to make Korean easier to write than Hanja, the Chinese-character writing tradition used in Korea. By the late 19th century, Hangul had spread beyond elite use. This is the history of the writing system, not a separate origin date for 쇰.

Why does 쇰 sometimes appear as 쇰?

It can be the same syllable in decomposed form.

Unicode normalization lets equivalent text use different forms. NFC can combine 쇰 into 쇰; NFD writes 쇰 as the three-part sequence. A field that shows the separate pieces may be displaying another Unicode form of the same syllable.

The conjoining jamo ᄉ, ᅬ, and ᆷ build the syllable block; the compatibility jamo ㅅ, ㅚ, and ㅁ are related characters with different encoding roles. They are not interchangeable in every input or text-processing context.