Advance ㅎ vain effort in Korean: 헛수고’s meaning and pronunciation vain effort in Korean is 헛수고. For examples, you can use like [헛수고를 시키다, 헛수고를 하다]. In this post you will learn how to pronounce and use vain effort in Korean along with examples. 2022.12.21 Advance ㅎAdvanced WordsWordsㅎ