Hangul Jungseong Eo

It is Hangul’s raw medial vowel component, not a complete syllable. In a Hangul jamo sequence, ᅥ supplies the vowel between an initial consonant and an optional final. In ordinary Korean, it sits inside blocks such as 어, 서, and 먹; alone, it is the middle piece, not the finished square.

Why is ᅥ alone?

By itself, ᅥ is a component, not a Korean word. This conjoining jamo is meant to join other Hangul letters into one syllable block. Its lookalike ㅓ is the compatibility form, designed to stand on its own; both represent the same vowel but behave differently when text is composed.

Hangul was created in 1443, and ㅓ was one of its original medial vowels. The 1446 Haerye, an explanatory book about the alphabet, describes vowel letters built from a few basic strokes and shows ㅓ as a dot joined to a vertical stroke. Hangul was designed to give Korean speakers an easier way to write their language than the Chinese characters then used for Korean.

Middle Korean used vowel harmony, a pattern that shaped which vowels appeared together within words. It weakened in early modern Korean, and some vowel distinctions merged; a historical spelling with ㅓ can therefore belong to a sound system different from today’s.

How do I type ᅥ?

Use a Korean IME for syllables; select the raw jamo separately. A Korean input method normally assembles typed consonant and vowel jamo into complete blocks: typing ㅓ after an initial gives 어, 서, and similar syllables. To enter literal ᅥ, choose the Hangul Jamo form in a Unicode character picker.