OpenHangul
Lesson 1 1-Year Course, Week 24

Natural Reactions and Back-Channel Words

Learn the short reaction words Koreans use all the time, like 진짜요?, 그렇구나, 대박 and 글쎄요, and when each one is polite or too casual.

Narae · Everyday conversation & today's Korean

What you will learn in this lesson

  • React naturally while someone is talking
  • Choose polite (-요) or casual reactions for the right person
  • Show surprise, agreement, sympathy and hesitation in Korean
Narae

Hi, I'm Narae! When I learned English, I could make full sentences, but I didn't know how to say small things like "Really?" or "Oh no!" Today we learn those small words. They make you sound so much more natural!

Why reactions matter

In Korean conversation, the listener is very active. While someone is talking, Koreans often say short words like 네, 아, 그렇구나 or 진짜요? to show they are listening. If you stay silent, the speaker may think you are not interested or that you don't understand.

These short words are called back-channel words. They are easy to learn, and they make a big difference. The most important rule is the same as in all Korean: add -요 when you talk to someone older, someone you don't know well, a teacher, a customer or a coworker. Without -요, most reactions are casual and are only for close friends of the same age or younger.

Surprise: "Really?"

  • 진짜요? jinjjayo?
    Really? Very common and friendly. Polite enough for most people you meet.
  • 진짜? jinjja?
    Really? Casual. Only with close friends of your age or younger.
  • 정말요? jeongmaryo?
    Really? Slightly softer and a little more careful than 진짜요?. Good with teachers and older people.
  • 정말? jeongmal?
    Really? Casual form. Close friends only.
  • 어머! eomeo!
    Oh my! Sudden surprise. Used mostly by women, and by older people of any gender. It is not rude, but it is very emotional.
  • 세상에! sesange!
    Oh my goodness! (literally: in the world!) Strong surprise, often at shocking or touching news. Fine with anyone.
  • 와! wa!
    Wow! For something amazing, beautiful or delicious. Safe with anyone.

Understanding and agreeing

  • 아, 그렇구나. [아, 그러쿠나.] a, geureokuna.
    Ah, I see. Casual. For friends. Shows that you just learned something.
  • 아, 그렇군요. [아, 그러쿤요.] a, geureokunyo.
    Ah, I see. Polite version of 그렇구나. Good with anyone older or new.
  • 맞아요. [마자요.] majayo.
    That's right. / Exactly. Polite agreement. Casual form: 맞아.
  • 그러니까요. geureonikkayo.
    I know, right? / That's what I'm saying. Strong agreement, when you feel the same way. Polite. Casual form: 그러니까.
  • 그쵸? geuchyo?
    Right? Short spoken form of 그렇지요?. Asking the other person to agree. Polite and friendly.
Narae

Here's a tip from me: 그러니까요 is my favorite! When my friend's mom complains that the bus is late, I say 그러니까요! and she smiles. It shows we feel the same.

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Strong feelings: 대박, 헐, 아이고

  • 대박! daebak!
    Awesome! / No way! / That's huge! Very casual. Use with friends and people your age. Avoid it with teachers, bosses, older strangers and in formal situations.
  • 대박이다! daebagida!
    That's amazing! Same feeling, a full sentence. Still casual.
  • 헐. heol.
    Whoa. / What?! (shock, disbelief) Very casual, almost slang. Only with close friends or in chat. Saying 헐 to an older person or a teacher sounds rude.
  • 아이고. aigo.
    Oh dear. / Oh no. / Phew. Sympathy, tiredness or small trouble. All ages use it, especially older people. It is polite enough for most situations.
  • 아이고, 어떡해요. [아이고, 어떠캐요.] aigo, eotteokaeyo.
    Oh no, what will you do? / That's terrible. Kind sympathy when someone has a problem. Polite.

Thinking and hesitating

  • 음… eum…
    Hmm… You are thinking. Safe with anyone.
  • 글쎄요. geulsseyo.
    Well… / I'm not sure. Polite way to say you don't know, or to avoid saying no directly. Casual: 글쎄.
  • 글쎄요, 잘 모르겠어요. [글쎄요, 잘 모르게써요.] geulsseyo, jal moreugesseoyo.
    Well, I'm not really sure. A gentle, polite answer.
  • 아, 네. a, ne.
    Ah, yes. / Oh, okay. Simple listening sound. Safe with everyone.

Polite or casual?

ReactionWith friends (same age or younger)With teachers, older people, coworkers
진짜? / 진짜요?진짜? is fineUse 진짜요? or 정말요?
그렇구나 / 그렇군요그렇구나 is fineUse 그렇군요 or 아, 네
맞아 / 맞아요맞아 is fineUse 맞아요
대박FineAvoid. Say 와, 정말 대단하네요 instead
헐Fine with close friendsNever. It sounds rude
아이고FineFine, often with -요 sentences after it
글쎄 / 글쎄요글쎄 is fineUse 글쎄요

When in doubt, add -요 or choose the softer word.

Two friends (casual)

A
나 다음 주에 제주도 가. na daeum jue jejudo ga.I'm going to Jeju Island next week.
B
진짜? 대박! 누구랑? jinjja? daebak! nugurang?Really? Awesome! With who?
A
가족이랑. 근데 비 온대. gajogirang. geunde bi ondae.With my family. But they say it will rain.
B
헐, 어떡해. heol, eotteokae.Oh no, that's too bad.
A
그러니까. 그래도 맛있는 거 많이 먹을 거야. geureonikka. geuraedo masinneun geo mani meogeul geoya.I know, right? Still, I'm going to eat lots of good food.
B
와, 부럽다! wa, bureopda!Wow, I'm jealous!

Talking with a teacher (polite)

A
저 다음 주에 제주도 가요. jeo daeum jue jejudo gayo.I'm going to Jeju Island next week.
B
정말요? 좋겠네요. jeongmaryo? jokenneyo.Really? How nice for you.
A
네. 그런데 비가 온대요. ne. geureonde biga ondaeyo.Yes. But they say it will rain.
B
아이고, 아쉽네요. aigo, aswimneyo.Oh dear, that's a shame.
A
그러니까요. 그래도 재미있을 것 같아요. geureonikkayo. geuraedo jaemiisseul geot gatayo.I know. But I think it will still be fun.
B
아, 그렇군요. 사진 많이 찍으세요. a, geureokunyo. sajin mani jjigeuseyo.Ah, I see. Take lots of pictures.

Easy to mix up

  • 그렇구나 vs 그렇군요 geureokuna vs geureokunyo
    Both mean "I see." 그렇구나 is casual. 그렇군요 is polite. With a new person, choose 그렇군요.
  • 진짜요? vs 정말요? jinjjayo? vs jeongmaryo?
    Both mean "Really?" Both are polite with -요. 정말요 feels a little softer, so it is nice with older people. 진짜요 is more lively.
  • 맞아요 vs 그러니까요 majayo vs geureonikkayo
    "That's right" vs "I know, right?" 맞아요 says a fact is correct. 그러니까요 shares a feeling: you agree with someone's complaint or opinion.

A few last tips

Don't overuse one word. If you say 대박 after every sentence, it starts to sound strange. Mix 와, 진짜요?, 그렇군요 and 맞아요.

Watch your tone. 진짜요? said slowly with a falling voice can sound like you don't believe the person. Say it with a rising, interested voice.

글쎄요 is a soft no. If a Korean answers your invitation with 글쎄요…, it often means "probably not." Don't push too hard.

Check quiz

  1. Q1. Your teacher tells you she got married last month. What is the best reaction?

  2. Q2. Which reaction shares a feeling, like "I know, right?"

  3. Q3. A friend asks if you want to go hiking at 5 a.m. You don't really want to. What is a soft answer?

  4. Q4. Which word is good for sympathy when someone hurt their leg?

  5. Q5. How is 맞아요 actually pronounced?

  6. Q6. Who can you say 헐 to?

Narae

Great job! Try one reaction word in your next Korean conversation, even just 아, 그렇군요. Koreans will notice, and they'll love it. 화이팅!

Key points

  • Korean listeners react often: 네, 아, 그렇군요, 진짜요?
  • Add -요 to reactions with older people, teachers, strangers and coworkers
  • 대박 and 헐 are casual; 헐 is never for older people
  • 그러니까요 shares a feeling; 맞아요 says something is correct
  • 글쎄요 means "I'm not sure" and is often a soft no

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