Hangul Letter Oe

It is the Korean vowel ㅚ, pronounced with a rounded sound or as /we/.

The spelling stayed while the sound changed. In the 15th century, ㅚ was the /oj/ diphthong, roughly like saying 오이 quickly. After the late 19th century, its sound shifted through /ø/ toward /we/, which modern standard pronunciation permits.

The vowel appears in the 1446 Hunminjeongeum Haerye, a guide to Hangul's letters and their design; the script's first record is dated 1443. Hangul was made to represent Korean speech. The shape of ㅚ shows its construction: it combines ㅗ and ㅣ, like the related combined vowels ㅙ and ㅞ.

How do you type ㅚ in Korean?

On the standard two-set layout, press H (ㅗ), then L (ㅣ).

There is no dedicated ㅚ key on that layout; the Korean input method combines the two vowel keys. A Korean syllable block also needs an initial consonant: ㅇ plus ㅚ forms 외.

The isolated ㅚ is a spacing compatibility letter, so it may stay separate instead of joining a syllable. That is a text-structure difference, not a font problem.