설명 - describing something to give someone an information what (s)he do not know about it. 게임 규칙을 설명해봐. tell me the rules of the game. 해명 - describing something to resolve misunderstanding. 어제 왜 전화안 받았는지 설명해봐. tell me why you did not receive my phone call yesterday.(she have no idea what happened) 어제 왜 전화안 받았는지 해명해봐. she have some idea why he did not receive the phone call. but it is not quite sure so she want to know if he can advocate for what she presumes.