Advance ㅅ sincerity in Korean: 성실성’s meaning and pronunciation sincerity in Korean is 성실성. For examples, you can use like [학업 성실성, 성실성이 부족하다]. In this post you will learn how to pronounce and use sincerity in Korean along with examples. 2022.12.21 Advance ㅅAdvanced WordsWordsㅅ