Koreans Don't Say 그런데. Here's What You Actually Hear

근데 [근데] geunde is 그런데 with its middle worn away. It means the same thing — but, by the way, so anyway — and in everyday conversation it is what people actually say. If you learned 그런데 and then never caught it in a drama, it was there all along: one syllable shorter than you were listening for.

What does the difference sound like?

Same sentence, twice. Listen to the first word of each.

• Textbook: 그런데 오늘은 좀 바빠요. [그런데 오느른 좀 바빠요] geureonde oneureun jom bappayo
• Natural: 근데 오늘은 좀 바빠요. [근데 오느른 좀 바빠요] geunde oneureun jom bappayo
• Both mean: But I'm a bit busy today.

Example audio is AI-generated.

The second version isn't lazier or ruder. It's just the version a Korean speaker produces without thinking, in the same way you say gonna in a sentence where you'd write going to. If your ear is waiting for three syllables, the two-syllable word goes straight past it — and so does the rest of the sentence, because you're still searching for the word you missed.

What does 근데 actually mean?

근데 does two jobs, and context tells you which one is running.

"But." It joins a sentence to the one before it and pushes against it: 맛있어요. 근데 좀 비싸요. [마시써요 근데 좀 비싸요] masisseoyo. geunde jom bissayo. — It's tasty. But it's a bit expensive.

"By the way." At the very start of a conversation turn, with nothing to contrast, it just changes the subject: 근데 밥 먹었어요? [근데 밥 머거써요] geunde bap meogeosseoyo? — By the way, have you eaten?

The second use is the one that confuses learners, because there's no but anywhere in the meaning. Treat 근데 at the start of a turn as a small throat-clear: okay, new topic.

Why does the middle syllable disappear?

Because nobody needs it. 그 at the front and 데 at the end already identify the word — nothing else in everyday Korean sounds like 그…데 — so the 러 in the middle carries almost no information and the mouth drops it. The rule in one line: when a word is common and easy to predict, the middle wears away and the two ends meet.

That rule isn't special to 그런데. It runs through a whole set of words you probably learned in their full form first.

Which other words shrink the same way?

Each row below is a word you already know, in the form you'll actually hear. Say the spoken column out loud, then the example.

Notice the pattern. In every row, two syllables in a row collapse into one: 러니 → 니, 러면 → 럼, 렇지 → 치, 조금 → 좀, 이야 → 얘, 마음 → 맘, 다음 → 담, 미있 → 밌. The meaning never changes. Only the length does.

Two of these — 좀 and 재밌어요 — are so normal that many learners already use the short form without noticing. The others are usually taught long and spoken short, which is exactly the gap that makes fast Korean sound like a different language from the one on the page.

Now go back to the spoken column and read it aloud, top to bottom, without looking at the written one. If you catch yourself sneaking the dropped syllable back in, that's the habit this post is trying to break.

Where is 근데 the wrong choice?

근데 is spoken Korean, and it gives that away wherever it appears. In conversation — with friends, with coworkers, with a shop assistant, in polite 해요체 — it's completely normal, and 근데요 [근데요] geundeyo is fine when you're speaking politely.

Switch back to the full form, or to a more formal word, when:

• You're writing anything official. An email to a professor or a client, a report, a cover letter. 근데 at the start of a formal email reads as careless. Use 그런데 or 하지만 [하지만] hajiman .
• You're in a job interview or giving a presentation. Not because 근데 is rude, but because it signals chatting, and the setting isn't a chat.
• You're reading something aloud. News anchors and narrators read what's written, so you'll hear 그런데 on the news even though nobody around the anchor would say it that way off-air.

The other words in the table sort into two groups. 좀, 얘기, 그럼 and 재밌어요 are fine almost anywhere you'd speak politely. 그니까, 그치, 맘에 and 담에 lean casual — use them with friends and people your age, and prefer 그렇죠 [그러초] geureochyo , 마음에 and 다음에 with someone older or someone you've just met.

Can you say it at full speed?

Here is one sentence, three breath groups. Say each chunk twice, then the whole thing.

1. 근데 그 영화 봤어? [근데 그 영화 봐써] geunde geu yeonghwa bwasseo? — By the way, did you see that movie?
2. 좀 길긴 한데 [좀 길긴 한데] jom gilgin hande — It's a bit long, but…
3. 재밌어. [재미써] jaemisseo. — …it's fun.

Full speed: 근데 그 영화 봤어? 좀 길긴 한데 재밌어. [근데 그 영화 봐써 좀 길긴 한데 재미써]

This is casual speech between friends — every verb ends in 반말. Three shrunk words in one short sentence is normal density for real conversation, which is why listening practice built on textbook audio doesn't prepare you for it. If you want the bigger picture of why real Korean feels fast, why Korean sounds so fast walks through the four sound changes that do most of the damage.

How do you know you really dropped the syllable?

You mostly can't, from the inside. When you say 근데, your brain knows you meant 그런데, and it quietly fills in the gap — so a half-dropped 그ㄹ데 sounds fine to you and odd to everyone else. The only reliable check is to record yourself and compare against a native version, syllable by syllable. That's the part a page can't do for you.

FAQ

Is 근데 slang?

No. It's standard spoken Korean, used by every age group, and dictionaries list it as the short form of 그런데. It's informal in the sense that it belongs to speech, not in the sense that it's rude.

Can I write 근데 in a text message?

Yes. Texts and chat messages are written speech, and 근데 is everywhere in them. Keep 그런데 for emails, documents and anything formal.

Is 근데 related to the -는데 ending?

Yes. 그런데 is built from 그러- (as in 그렇다) plus the same -ㄴ데 connector you see on verbs, like 비싼데 or 가는데. That's why both carry the same but / and so feeling — 근데 is that ending turned into a word you can start a sentence with.