From ㅇ (–, represents lack of a consonant), with an additional stroke from ㄱ (k) to represent a velar sound. See the Etymology section on modern Korean ㅇ (–, ng) for the motivations of this.
- A letter representing the velar nasal, /ŋ/. Called 옛이응 (yesieung) in Modern Korean.
- Korean: ㅇ (–, ng, also represents lack of a consonant) (merged with ㅇ (–))