interjection[어허]Advanced
Englishoh; right: An exclamation uttered when the speaker realizes something he/she failed to think of before.
미처 생각하지 못한 것을 깨달았을 때 내는 소리.
Englishno: An exclamation uttered when the speaker feels dissatisfied or uneasy.
못마땅하거나 불안할 때 내는 소리.
Source: 한국어기초사전 (Basic Korean Dictionary) · CC BY-SA 2.0 KR