Advance ㅇ only son in Korean: 외동아들’s meaning and pronunciation only son in Korean is 외동아들. For examples, you can use like [귀여운 외동아들, 외동아들이 있다]. In this post you will learn how to pronounce and use only son in Korean along with examples. 2022.12.21 Advance ㅇAdvanced WordsWordsㅇ