Advance ㅂ insincerity in Korean: 불성실’s meaning and pronunciation insincerity in Korean is 불성실. For examples, you can use like [업무 불성실, 불성실 답변]. In this post you will learn how to pronounce and use insincerity in Korean along with examples. 2022.12.21 Advance ㅂAdvanced WordsWordsㅂ