Advance ㅎ key in Korean: 핵’s meaning and pronunciation
key in Korean is 핵. For examples, you can use like [팀의 핵, 핵이 되다]. In this post you will learn how to pronounce and use key in Korean along with examples.
Key in Korean
Advance ㅎ 
Intermediate Words key in Korean: 핵심’s meaning and pronunciation
key in Korean is 핵심. For examples, you can use like [사건의 핵심, 핵심 내용]. In this post you will learn how to pronounce and use key in Korean along with examples.
Basic ㅇ Key in Korean: 열쇠’s meaning and pronunciation
Key in Korean is 열쇠. For examples, you can use like [금고 열쇠, 만능 열쇠]. In this post you will learn how to pronounce and use Key in Korean along with examples.