Hangul Syllable Jess

It is a Korean syllable block, not an English translation. It joins initial ㅈ, vowel ㅔ, and final ㅆ. Unicode’s “jess” is a Latin-letter label for those parts, not a translation. At a syllable end, ㅆ closes like an unreleased “t”; before a vowel it links into the next syllable as a tense “s.” Fonts may style the strokes without changing the letters.

Hangul is first recorded in 1443. The 1446 book Hunminjeongeum (“Correct Sounds for the Instruction of the People”) explained letters meant to make Korean easier to write than the Chinese characters used in formal writing. Earlier names included jeongeum (“correct sounds”) and eonmun (“vernacular writing”); Hangeul became familiar.