겪다 (is if usually used when talking of a bad experience?) -> right Ex) 예전에 그 직장에서 많은일을 겪었지. I experienced many happens in ex-company 튼튼하다 -> healthy and strong 그는 정마로 튼튼해 지치지도 않아 ->He is really strong even not exhausted. 당기다 (have no idea how to use it lol) -> pull but it used only many situation. Ex) 그는 사람을 당기게하는 매력이있어 He is charming person who makes me pull. Ex) 당기시오. Pull (on door message) 끔찍하다/끔찍스럽다 (what's the difference between the two?) -> 끔찍하다 it was terrible 끔찍스럽다 I feel terrible 끔찍하다 is formal using but 끔찍스럽다 use on feeling. 깔끔하다 > 깨끗하다 (차이가 있나요?) Both are almost same meaning but Little differnt 깔끔하다 -> looks clean 깨끗하다 -> clean 애쓰다 (I just need some clarification on it's usage) = try to 그는 여자친구를 만드려고 애쓰지만 번번히 실패하지. He trys to make a girlfriends but always to fail and 정성껏 (잘 모르겠습니다 ㅋㅋ -> with sincerity