No Way in Korean: Disbelief with 말도 안 돼요 vs Refusal with 안 돼요
Learn how Koreans express "no way" for disbelief or refusal, using 말도 안 돼요 and 안 돼요 with the right casual or polite ending and tone.
By PookieFriends & plans · Yapr Learn
"No way" does two different jobs in English: it can mean "I don't believe it" or "that's not allowed." Korean keeps these apart. For disbelief, the core expression is 말도 안 돼요 (maldo an dwaeyo), literally "it doesn't even make sense." For refusal or prohibition, you use 안 돼요 (an dwaeyo), "it doesn't work" or "you can't." This lesson shows the two patterns, the casual and polite endings, and how tone changes how strong the response feels.
By the end, you can…
- express disbelief with 말도 안 돼요 and its casual form 말도 안 돼.
- refuse or say something is not allowed with 안 돼요 and 안 돼.
Listen once. Try it slowly. Then say it without looking.
Checking available voices…
말도 안 돼요.
No way. / That makes no sense. (disbelief)
mal-do an dwae-yo
Polite disbelief. Use when you hear surprising or hard-to-believe news. The literal sense is "it doesn't even make sense," so it is not a refusal.
말도 안 돼.
No way. / That's unbelievable. (casual disbelief)
mal-do an dwae
Same meaning as 말도 안 돼요 but casual. Use with close friends or people younger than you. Dropping 요 makes it informal, not rude by itself.
안 돼요.
No. / You can't. / It's not allowed. (refusal)
an dwae-yo
Polite refusal or prohibition. Use when something is not possible or not permitted, such as a request you must turn down.
안 돼.
No. / You can't. (casual refusal)
an dwae
Casual refusal or prohibition. Use with friends or children. It can sound blunt, so tone matters.
진짜요?
Really? (polite)
jin-jja-yo
A polite follow-up when you hear something surprising. It invites the speaker to confirm before you react with 말도 안 돼요.
Pronunciation guides are approximate. Slow playback keeps the original pitch.
Make it make sense
Useful pattern
The key difference is 말도 vs no 말도. 말도 안 돼요 means "that can't be true" or "that's absurd," so it reacts to information: 친구가 시험에 떨어졌어요? 말도 안 돼요. (Your friend failed the exam? No way.) 안 돼요 means "it doesn't work" or "you can't do that," so it reacts to a plan, request, or rule: 여기에서 사진을 찍으면 안 돼요. (You can't take photos here.) Both use the same verb 되다 (doe-da, "to work, to be okay"), but 말도 adds the meaning "even words," which is why it expresses disbelief rather than refusal.
When to use it
Use the polite forms with strangers, staff, teachers, and people older than you. Use the casual forms with close friends and children. Tone changes force: a flat 안 돼요 is a clear refusal, while a rising, surprised 말도 안 돼요? asks "really, no way?" A sharp, low 안 돼 can sound scolding, so soften it with a reason: 지금은 안 돼요, 다음에 해요. (Not now, let's do it next time.) If you only need to check what you heard, 진짜요? is safer than a strong reaction.
Listen to each line, then take one part and reply out loud.
어제 시험에 떨어졌어요.
I failed the exam yesterday.eo-je si-heo-me tteo-reo-jyeo-sseo-yo말도 안 돼요. 진짜요?
No way. Really?mal-do an dwae-yo. jin-jja-yo?네, 그래서 오늘은 놀러 갈 수 없어요.
Yes, so I can't go out today.ne, geu-rae-seo o-neu-reun nol-leo gal su eop-seo-yo알겠어요. 그럼 오늘은 안 돼요. 내일 만나요.
I see. Then today doesn't work. Let's meet tomorrow.al-ge-sseo-yo. geu-reom o-neu-reun an dwae-yo. nae-il man-na-yoA little context goes a long way
Korean endings carry politeness directly, so the same idea can be polite or casual depending on 요 and the verb form. 말도 안 돼요 is common in everyday disbelief, but it can sound dramatic if used for small matters. 안 돼요 is a normal, useful refusal; adding a short reason or an alternative keeps it cooperative rather than abrupt.
One thing to watch for
Using 말도 안 돼요 to refuse a request, as in a friend asking to borrow something and you answer 말도 안 돼요.
Try this instead: For a refusal, use 안 돼요: 미안하지만 안 돼요. (Sorry, but no.) Reserve 말도 안 돼요 for disbelief, as in 그런 일이 있었다고요? 말도 안 돼요. (You say that happened? No way.)
Your turn
Try answering out loud before checking a possible answer.
1Your friend says a famous singer is coming to your town. You are surprised and want to say "No way" politely. What do you say?
Show a sample answer
말도 안 돼요.
This expresses disbelief politely. 말도 안 돼 is also correct with a close friend, but the polite form fits a general listener.
2A staff member tells you that you cannot enter with food. How do you say "You can't" politely?
Show a sample answer
안 돼요.
This is a polite refusal or prohibition. Depending on the situation, a fuller sentence such as 음식은 안 돼요 is also natural.
3You want to check surprising news before reacting strongly. What polite question can you ask?
Show a sample answer
진짜요?
진짜요? means "Really?" and invites confirmation. 정말요? is also a valid polite alternative.
Use 말도 안 돼요 for disbelief and 안 돼요 for refusal or prohibition; choose 요 for polite situations and drop it only with close friends or children.
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