Hi, 대답 [對答] is a noun that means one's reply or response. It's verbal form 대답하다 [對答하다] means to reply or respond. 답 is a noun that also means one's reply or response. However, a verb phrase such as 답하다 does not exist in the Korean language. 답 can also be found in phrases such as 답안 [答案], a noun which means an answer, as well as 회답 [回答] which means a reply. Good luck in your studies! -Raymond

대답: verbal reply or answer 답: answer or solution in general You answer (대답하다) if someone asks you a question. You can find an answer (답) to a question in an exam, or find a 답 to problems in life. When you face a serious problem with no easy way out, you might say 답이 없다. There is a slang made from this concept, 노답, meaning "no solution" or "no way out" (노 is the reading of English "no").