This is the 14408th most frequent Korean word.
무엇
"What."
Used as the object of the verb 'to help', indicating the thing or matter that requires assistance.
무엇을 도와드릴까요?
How can I help you?
Used to indicate an uncertain action or decision, functioning as the object.
저는 무엇을 할지 모르겠어요.
I don't know what to do.
Used as the subject of the sentence, referring to the needed item or thing.