* 묻다 (mutda): This is the most general verb meaning "to ask." You'd use it in a sentence like "저는 질문을 묻겠습니다 (jeoneun jilmuneul mutgesseumnida)," meaning "I will ask a question."
* 질문하다 (jilmunhada): This means "to ask a question." It's more specific than 묻다.
* 요청하다 (yochonghda): This means "to request" or "to ask for something." You'd use this when asking for a favor or something specific.
So there's no single word like "ask" in Korean, the appropriate word depends on what kind of question or request is being made.