Idioms, Proverbs & 사자성어 - Korean Intermediate (B1-B2)

Imagine a Korean coworker says about your manager: 그분은 발이 정말 넓어요. You know every word — 발 is "foot", 넓다 is "wide" — and yet the sentence makes no sense. Does your manager have wide feet? No: it means she knows a lot of people. This is the moment every B2 learner reaches, when the grammar is under control but the expressions still trip you up. Korean is full of them, and native speakers use them constantly — in chat, in dramas, in news headlines and in TOPIK reading passages.

This lesson gives you the three layers of fixed expression in Korean, the most useful items in each, and — just as important — a sense of when each one fits. An idiom used in the right place makes you sound fluent; a proverb used at the wrong moment makes you sound like a fortune cookie.

🧠 The Mental Model: Three Layers of Fixed Expression

Layer	What it is	Example	Where you meet it
관용어 (idioms)	A phrase whose meaning isn't the sum of its words; usually a body part + verb	발이 넓다 — to know many people	Everywhere: chat, work, dramas, news
속담 (proverbs)	A complete folk saying with a lesson or observation	티끌 모아 태산 — every little bit adds up	Conversation, speeches, columns, advice
사자성어 (four-character idioms)	Four Sino-Korean syllables, usually from Classical Chinese	작심삼일 — resolutions that last three days	Essays, news, speeches — and jokes

The good news: idioms conjugate like any other verb phrase. Once you know 발이 넓다, you can say 발이 넓은 사람 (a well-connected person), 발이 넓어서 (because she's well connected) or 발이 넓으시네요 (you really know everyone!). What you can't do is swap the words: 발이 크다 ("big feet") is just a comment about shoe size. The fixed part is fixed; the ending is free.

💡 The Formula

[fixed idiom stem] + [any ending you already know]

눈이 높다 → 눈이 너무 높아서 아직 결혼을 못 했대요 — "They say he's too picky, so he still hasn't married."

You can usually add adverbs (정말, 너무, 좀) and change the tense, but you should keep the noun, the particle and the verb exactly as learned.

🦶 관용어: Body-Part Idioms

Korean builds a huge number of idioms from body parts, and they follow a loose logic: 눈 (eyes) is about standards and attention, 입 (mouth) is about talking and taste, 귀 (ears) is about listening and being persuaded, 손 (hands) is about effort and generosity, 발 (feet) is about going places and social reach, and 배/간 (belly, liver) are about gut feelings and courage.

관용어	Romanization	Literal	Meaning
발이 넓다	bari neolda	feet are wide	to know many people, be well connected
눈이 높다	nuni nopda	eyes are high	to have high standards, be picky
손이 크다	soni keuda	hands are big	to be generous; to make or buy far too much
입이 무겁다	ibi mugeopda	mouth is heavy	to keep secrets well (opposite: 입이 가볍다)
귀가 얇다	gwiga yalda	ears are thin	to be easily persuaded, gullible
배가 아프다	baega apeuda	stomach hurts	to be jealous (of someone's good luck)
눈코 뜰 새 없다	nunko tteul sae eopda	no time to open eyes or nose	to be extremely busy
머리를 맞대다	meorireul matdaeda	put heads together	to brainstorm, discuss together
입에 맞다	ibe matda	fits the mouth	to suit one's taste (food)
손을 떼다	soneul tteda	take hands off	to quit, wash one's hands of something

A few very common idioms have nothing to do with body parts — they come from food and old customs:

관용어	Meaning	Why
미역국을 먹다	to fail an exam	Seaweed soup is slippery — you "slip" and fall. (Students avoid eating it before exams!)
바가지를 쓰다	to get ripped off, overcharged	Literally "to wear a gourd bowl"
시치미를 떼다	to feign ignorance, play dumb	시치미 was an owner's tag on a hunting falcon; removing it hid whose bird it was
국수를 먹다	to get married (attend a wedding)	Noodles (long life) were the traditional wedding food: 언제 국수 먹여 줄 거야? "When are you getting married?"
파김치가 되다	to be exhausted, wiped out	You go limp like pickled green onions

In Real Sentences

Korean	English
우리 팀장님은 발이 넓으셔서 업계에 모르는 사람이 없어요.	Our team leader is so well connected that there's nobody in the industry she doesn't know.
걱정하지 마. 나 입이 무거운 사람이야. 아무한테도 말 안 할게.	Don't worry, I can keep a secret. I won't tell anyone.
동생은 귀가 얇아서 홈쇼핑만 보면 뭘 꼭 사요.	My younger sibling is so easily swayed that he always buys something whenever he watches home shopping.
이번 주는 마감 때문에 눈코 뜰 새 없이 바빴어요.	This week I was insanely busy because of deadlines.
어머니는 손이 크셔서 명절 음식을 늘 너무 많이 하세요.	My mother is so generous that she always makes far too much holiday food.
여행지에서 택시를 탔다가 바가지를 썼어요.	I took a taxi at the tourist spot and got ripped off.
한국 음식이 입에 맞으세요?	Does Korean food suit your taste?
야근을 삼 일 연속 했더니 완전히 파김치가 됐어요.	I worked late three days in a row, and now I'm completely wiped out.

⚠️ Honorifics Still Apply

An idiom about a senior person takes -(으)시- like any other predicate: 팀장님은 발이 넓으세요, 할머니는 손이 크세요. Grammatically the subject is the body part, but the honour goes to its owner — the same logic as 할아버지는 키가 크세요 from the beginner tier.

📜 속담: Proverbs

Proverbs are complete sentences, usually in plain (한다체) form, so they sound a bit like quotations. That is exactly how Koreans use them: you cite a proverb to comment on a situation. Here are the ones you will hear most.

속담	Literal	Meaning / English equivalent
가는 말이 고와야 오는 말이 곱다	Outgoing words must be kind for incoming words to be kind	Treat others as you want to be treated
낮말은 새가 듣고 밤말은 쥐가 듣는다	Birds hear daytime words, mice hear night words	The walls have ears
원숭이도 나무에서 떨어진다	Even monkeys fall from trees	Even experts make mistakes
소 잃고 외양간 고친다	Fixing the barn after losing the cow	Closing the stable door after the horse has bolted
호랑이도 제 말 하면 온다	Even the tiger comes if you talk about it	Speak of the devil
티끌 모아 태산	Gather dust and you get a great mountain	Every little bit adds up
백지장도 맞들면 낫다	Even a sheet of paper is easier lifted by two	Many hands make light work
사공이 많으면 배가 산으로 간다	Too many boatmen and the boat goes up the mountain	Too many cooks spoil the broth
발 없는 말이 천 리 간다	A word without feet travels a thousand li	News (and gossip) travels fast
누워서 떡 먹기	Eating rice cake lying down	A piece of cake
그림의 떡	Rice cake in a picture	Something you can see but never have
금강산도 식후경	Even Mt. Geumgang is sightseeing after eating	Food first, then everything else

Notice the pun in 말: in 가는 말이 고와야… and 발 없는 말이… 말 means "words", but it is spelled the same as 말 "horse" — which is why a "word without feet" travelling a thousand li is funny. A 리 (里) is an old unit of distance of roughly 400 metres, so 천 리 is simply "very far".

How to Drop a Proverb Into Conversation

You rarely just blurt out a proverb. Koreans wrap it in a frame that says "as the saying goes". These frames use grammar you have already met in the reported-speech and -더- lessons:

Frame	Korean	English
-다는 말이 있잖아요	티끌 모아 태산이라는 말이 있잖아요. 조금씩이라도 저축하세요.	You know the saying "every little bit adds up". Save even a little at a time.
속담에 -다고 하잖아요	속담에 백지장도 맞들면 낫다고 하잖아요. 같이 해요.	The proverb says two can lift a sheet of paper more easily. Let's do it together.
-다더니 (… and sure enough)	호랑이도 제 말 하면 온다더니, 저기 민수 씨 오네요!	Speak of the devil — here comes Minsu!
-(이)라더니	그림의 떡이라더니, 백화점 옷은 보기만 해요.	They say "a rice cake in a picture" — I just look at the department-store clothes.
딱/그야말로 N(이)네요	이 문제는 그야말로 누워서 떡 먹기네요.	This problem is truly a piece of cake.

-다더니 is a contraction of -다고 하더니: "they said X, and (now I see) it's true". It is the single most natural way to apply a proverb to something that just happened. For noun-ending proverbs (그림의 떡, 티끌 모아 태산) use -(이)라더니 or -(이)라는 말이 있잖아요.

🀄 사자성어: Four-Character Idioms

사자성어 (四字成語) are four Sino-Korean syllables, each one a hanja morpheme — so last lesson's work on Sino-Korean roots pays off immediately. Many come from Chinese classics; some are Korean-made. They are compact, a little learned-sounding, and loved by news writers, speech-givers and anyone writing an essay.

사자성어	Hanja	Romanization	Breakdown → meaning
작심삼일	作心三日	jaksimsamil	make + mind + three + days → a resolution that lasts three days
일석이조	一石二鳥	ilseogijo	one + stone + two + birds → two birds with one stone
금시초문	今始初聞	geumsichomun	now + begin + first + hear → first I've heard of it
대기만성	大器晩成	daegimanseong	great + vessel + late + complete → a late bloomer
설상가상	雪上加霜	seolsanggasang	snow + on + add + frost → adding insult to injury
역지사지	易地思之	yeokjisaji	swap + place + think → put yourself in their shoes
동문서답	東問西答	dongmunseodap	east question, west answer → an irrelevant answer
고진감래	苦盡甘來	gojingamnae	bitter ends, sweet comes → no pain, no gain
막상막하	莫上莫下	maksangmakha	none above, none below → neck and neck
우왕좌왕	右往左往	uwangjwawang	go right, go left → running around in confusion

Grammar Around 사자성어

Most 사자성어 are nouns, so they take 이다, particles and noun frames. A few describe an action and take 하다.

Pattern	Korean	English
N이에요/예요	그 얘기는 금시초문이에요.	That's the first I've heard of it.
N(으)로 끝나다	올해 다이어트도 작심삼일로 끝났어요.	My diet this year also ended after three days.
N의 N	이 경기는 막상막하의 승부였다.	This match was a neck-and-neck contest.
N하다	갑자기 불이 꺼지자 사람들이 우왕좌왕했다.	When the lights suddenly went out, people ran around in confusion.
N형 (type)	그는 전형적인 대기만성형 배우다.	He is a classic late-blooming actor.
N(이)라고 하다	이런 걸 일석이조라고 하죠.	This is what you'd call two birds with one stone.

🔀 Which One? Choosing the Right Layer

Several ideas can be said in two or three layers. Choosing between them is mostly about register.

Idea	Casual / spoken	Proverb	사자성어 (formal / written)
Two benefits at once	꿩 먹고 알 먹고 (eat the pheasant and the egg)	—	일석이조
Hard work pays off	—	고생 끝에 낙이 온다	고진감래
Very easy	식은 죽 먹기	누워서 떡 먹기	—
Things go from bad to worse	엎친 데 덮친 격	—	설상가상
Being extremely busy	눈코 뜰 새 없다	—	(no common one — use 매우 바쁘다 in writing)

✅ Register Rule of Thumb

관용어 are safe almost everywhere, including polite conversation with seniors and most writing.

속담 are warm and folksy; great in conversation, speeches and opinion columns, but be careful using them to lecture someone older.

사자성어 sound educated. In an essay (like TOPIK 쓰기 54) one well-chosen 사자성어 adds polish; three in a paragraph sounds forced. In casual talk, people often use them jokingly: 또 작심삼일이야? ("Three-day resolution again?")

💬 Dialogue: New Year Resolutions

Speaker	Korean	English
지은	너 새해에 매일 운동한다고 했잖아. 요즘도 해?	You said you'd work out every day in the new year. Still doing it?
마크	음… 사실 사흘 하고 그만뒀어. 완전 작심삼일이지 뭐.	Um… actually I quit after three days. A total three-day resolution, what can I say.
지은	그럴 줄 알았어. 그럼 나랑 같이 등산 다닐래? 운동도 하고 친구도 사귀고, 일석이조잖아.	I knew it. Then want to go hiking with me? You exercise and make friends — two birds with one stone.
마크	좋지. 근데 네 등산 동호회 사람들 다 잘 타잖아. 나 따라갈 수 있을까?	Sure. But everyone in your hiking club is really good. Can I keep up?
지은	걱정 마. 우리 회장님이 발이 넓어서 초보자 모임도 따로 있어.	Don't worry. Our club president knows everyone, so there's a separate beginners' group too.
마크	오, 그건 금시초문인데? 진작 말해 주지.	Oh, that's news to me. You should have told me sooner.
지은	어? 호랑이도 제 말 하면 온다더니, 저기 회장님 전화 온다!	Huh? Speak of the devil — the president is calling right now!
마크	하하, 그럼 지금 바로 가입할게. 이번엔 진짜 고진감래를 보여 줄게.	Haha, then I'll join right now. This time I'll really show you that hard work pays off.

Look at how naturally the two speakers slide 사자성어 into casual 반말 — 완전 작심삼일이지 뭐, 일석이조잖아. In speech, four-character idioms are often used with a wink, which is part of their charm.

📰 Reading: 작심삼일을 이기는 법

Korean
새해가 되면 많은 사람들이 운동이나 외국어 공부 같은 계획을 세운다. 그러나 그 결심이 사흘을 넘기지 못하는 경우가 많아서 '작심삼일'이라는 말까지 생겼다. 그렇다면 작심삼일을 막는 방법은 없을까? 전문가들은 목표를 작게 나누라고 조언한다. '티끌 모아 태산'이라는 속담처럼 하루 십 분의 공부도 일 년이 지나면 큰 차이를 만든다. 또 계획이 한 번 무너졌다고 해서 포기할 필요는 없다. 작심삼일을 백 번 하면 삼백 일이 되기 때문이다. 고생 끝에 낙이 온다는 말을 믿고 오늘 다시 시작해 보자.

Korean

새해가 되면 많은 사람들이 운동이나 외국어 공부 같은 계획을 세운다. 그러나 그 결심이 사흘을 넘기지 못하는 경우가 많아서 '작심삼일'이라는 말까지 생겼다. 그렇다면 작심삼일을 막는 방법은 없을까? 전문가들은 목표를 작게 나누라고 조언한다. '티끌 모아 태산'이라는 속담처럼 하루 십 분의 공부도 일 년이 지나면 큰 차이를 만든다. 또 계획이 한 번 무너졌다고 해서 포기할 필요는 없다. 작심삼일을 백 번 하면 삼백 일이 되기 때문이다. 고생 끝에 낙이 온다는 말을 믿고 오늘 다시 시작해 보자.

Notice -다고 해서 in 무너졌다고 해서 포기할 필요는 없다 — "just because X doesn't mean Y". It is a common written-style frame worth stealing for your own essays.

⚠️ Common Mistakes

⚠️ Watch Out For

Changing the words. ✗ 발이 커요 / ✗ 눈이 비싸요. Idioms only work in their fixed form: 발이 넓어요, 눈이 높아요.

Translating English idioms word for word. "Break a leg" is not 다리를 부러뜨리세요 (that is a threat!). Say 잘하세요 or 파이팅! "It's raining cats and dogs" is 비가 억수같이 와요.

Forgetting 이다 after a 사자성어. ✗ 그건 일석이조. (only acceptable as a headline or a clipped casual remark) → ✓ 그건 일석이조예요 / 일석이조네요.

Choosing 이에요 vs 예요 by the hanja instead of the sound. It is the last syllable that counts: 작심삼일이에요 (ends in ㄹ), 일석이조예요 (ends in a vowel).

Using 배가 아프다 literally in the wrong place. 사촌이 땅을 사면 배가 아프다 is about jealousy. If you really have a stomachache, add context: 점심을 잘못 먹었는지 배가 아파요.

Overloading an essay. Three 사자성어 in one paragraph sounds like you memorised a list. One apt expression per essay is plenty.

✏️ Practice

Exercise 1 — Complete the body-part idiom

민수 씨는 모르는 사람이 없어요. _____ 넓은 사람이에요. (feet) (Answer: 발이)
제 동생은 비밀을 절대 말하지 않아요. 입이 _____. (heavy, 해요체) (Answer: 무거워요)
광고만 보면 바로 사는 걸 보니 너 정말 _____ 얇구나. (ears) (Answer: 귀가)
이상형 조건이 스무 개나 된대요. 눈이 너무 _____. (높다, 해요체) (Answer: 높아요)
요즘 일이 많아서 눈코 뜰 _____ 없어요. (the missing noun) (Answer: 새)
할머니께서는 음식을 하시면 늘 열 명분을 하세요. 손이 _____. (크다, honorific 해요체) (Answer: 크세요)
또 시험에 떨어졌어요. 미역국을 _____. (먹다, past 해요체) (Answer: 먹었어요)
관광지에서 기념품을 세 배나 비싸게 샀어요. 바가지를 _____. (쓰다, past 해요체) (Answer: 썼어요)

Exercise 2 — Finish the proverb

가는 말이 고와야 오는 말이 _____. (Answer: 곱다)
낮말은 새가 듣고 밤말은 _____가 듣는다. (Answer: 쥐)
_____도 나무에서 떨어진다. (even experts slip) (Answer: 원숭이)
소 잃고 _____ 고친다. (the barn) (Answer: 외양간)
호랑이도 제 말 하면 _____. (오다, 한다체) (Answer: 온다)
사공이 많으면 배가 _____으로 간다. (Answer: 산)
발 없는 말이 _____ 리 간다. (a thousand) (Answer: 천)

Exercise 3 — Choose the 사자성어

Word bank: 작심삼일, 일석이조, 금시초문, 대기만성, 설상가상, 역지사지, 동문서답, 막상막하

새해 결심이 사흘 만에 끝났어요. 완전히 _____이에요. (Answer: 작심삼일)
운동도 하고 교통비도 아끼니까 자전거 출퇴근은 _____예요. (Answer: 일석이조)
회사가 이사를 간다고요? 그 얘기는 _____이에요. (Answer: 금시초문)
그 작가는 쉰 살에 첫 소설로 성공했어요. 전형적인 _____형이에요. (Answer: 대기만성)
비가 오는데 우산까지 잃어버렸어요. 그야말로 _____이네요. (Answer: 설상가상)
질문과 전혀 상관없는 대답을 하는 것을 _____이라고 해요. (Answer: 동문서답)
싸우기 전에 상대방의 입장에서 생각해 보세요. _____가 중요해요. (Answer: 역지사지)
두 팀의 실력이 비슷해서 누가 이길지 모르겠어요. 정말 _____예요. (Answer: 막상막하)

Exercise 4 — Complete the dialogue

A: 방금 민지 얘기하고 있었는데 민지가 왔어! B: 호랑이도 제 말 하면 _____! (오다 + "just as they say") (Answer: 온다더니)
A: 이 일, 혼자 하기 너무 힘들지? B: 응. 백지장도 _____ 낫다는데 좀 도와줄래? (맞들다 + if) (Answer: 맞들면)
A: 사촌이 복권에 당첨됐대. B: 솔직히 좀 배가 _____. (아프다, 반말) (Answer: 아파)
A: 이번 발표는 다 같이 머리를 _____ 준비해 보자. (맞대다 + and) (Answer: 맞대고)
A: 그 사람, 거짓말을 해 놓고 모르는 척 시치미를 _____. (떼다, past 해요체) (Answer: 뗐어요)
A: 이 김치찌개 입에 _____? (맞다, polite question) B: 네, 정말 맛있어요. (Answer: 맞아요|맞으세요)

Exercise 5 — Reading comprehension

결심이 _____을 넘기지 못해서 '작심삼일'이라는 말이 생겼다. (three days, native word) (Answer: 사흘)
전문가들은 목표를 _____ 나누라고 조언한다. (작다 + -게) (Answer: 작게)
'티끌 모아 _____'처럼 작은 노력도 큰 차이를 만든다. (Answer: 태산)
작심삼일을 백 번 하면 _____ 일이 된다. (number) (Answer: 삼백|300)
글쓴이는 계획이 한 번 무너져도 _____할 필요가 없다고 말한다. (give up) (Answer: 포기)

🧠 Check Your Understanding

Q1: Your friend says 우리 오빠는 귀가 얇아요. What does she mean about her brother?

Q2: You and a colleague were just gossiping about your manager when he walks in. What is the most natural thing to whisper?

Q3: Which register choice is best for the conclusion of a formal TOPIK essay about teamwork?

Q4: Which sentence is correct?

❓ Common Questions

🌟 Going Further

Challenge 1: Write a 200–300 character paragraph in 한다체 about a time a plan of yours failed and what you learned. Use exactly one 사자성어 and one 속담, each in a natural frame (-다는 말처럼, -다더니).

Challenge 2: Watch one episode of a Korean drama or variety show and note every idiom you hear. Many variety-show captions (자막) put idioms in big letters — they are easy to spot and pause on.

If idioms feel endless, that's because they are — even native speakers keep learning new ones into adulthood. You don't need all of them; you need the common core and the confidence to ask 그게 무슨 뜻이에요? when a new one appears. Every one you collect makes the next one easier to guess.

🔮 Looking Ahead

Idioms are the "classic" side of expressive Korean. Next, in Lesson 25: Korean in the Wild, we go to the opposite end: regional dialects, internet slang, 줄임말 and Konglish — the Korean you actually hear in dramas, variety shows and group chats.

🇰🇷 Lesson 24: Idioms, Proverbs & 사자성어