Three times in the last three lessons you were told "that one is odd, and Lesson 5 explains why". Here they are, all at once — and all three are the same phenomenon.
Every one of them happens at the bottom of a block — at the 받침 batchim, the final consonant. A batchim is not pronounced the way the same letter is pronounced at the top of a block, and it reacts to whatever comes next. That is the entire content of this lesson.
No new characters today. Not one. You already know all 40, and you can already split any block into slots and name its letters. What you cannot yet do is predict what those letters will actually sound like when they are stacked next to each other — which is exactly why a sign's Latin line sometimes disagrees with the Hangul above it.
You are not learning to speak Korean, so "pronounce it properly" is not the reason. The reason is matching, and it runs backwards.
You see a place name in a quiz result, on a map, in a YouTube video: Jongno. Later a road sign says 종로 . Sound it out with Lesson 1–4 knowledge and you get "jong-ro" — and you will never connect the two. One rule from this lesson closes that gap, and the same rule closes it for 신라 Silla, 한라산 Hallasan, and 왕십리 Wangsimni.
The one-sentence version. Lessons 3 and 4 taught you to run a sign's romanization backwards into exact jamo. That trick still works for the letters — but for whole words, the Latin line is written from how the word is said, not from how it is spelled. This lesson is the map between the two.
Sixteen of the nineteen consonants can sit at the bottom of a block — only ㄸ ㅃ ㅉ never do. On top of that, eleven pairs of consonants can share the bottom slot. That is 27 different things you can see down there. They make seven sounds.
The t group is the one to memorise. 옷 (clothes), 낮 (daytime), 꽃 (flower), 밭 (field) are all pronounced "ot" / "nat" / "kkot" / "bat" — the same final sound in all four. Seven different letters, zero audible difference. This is why 꽃집 came out as "kkot-jjip".
And they are all held. A final ㄱ ㄷ ㅂ is stopped and never released — you close the mouth and simply stop, with no little puff at the end. German already does half of this: Rad comes out as "Rat", Weg as "Wek". Korean does the same trick, only harder and to seven letters instead of three.
These eleven clusters are the last genuinely unfamiliar thing in Hangul, and they have been kept out of every word list until now. They are not hard: read the left-hand letter and throw the other away. Three exceptions, and all three start with ㄹ.
| Cluster | Sounds like | Example |
|---|---|---|
| ㄳ ㄵ ㄶ | k · n · n | Left letter wins. 앉다 = "an-tta" (to sit) |
| ㄼ ㄽ ㄾ ㅀ | l | Left letter wins. 여덟 = "yeo-deol" (eight) |
| ㅄ | p | Left letter wins. 값 = "gap" — price, and it is printed on price tags |
| ㄺ ㄻ ㄿ | k · m · p | The exceptions — the right letter wins. 닭 = "dak" (chicken), 삶 = "sam" |
You will meet exactly two of these on a street. 값 "gap" = price, on tags and menus. And 닭 "dak" = chicken, in 닭갈비 dakgalbi — the stir-fried chicken dish that is the signature food of 춘천 Chuncheon, and a restaurant sign you will see all over Gangwon. Learn those two, skim the rest.
Remember that ㅇ at the top of a block is a placeholder holding nothing. Korean hates leaving it empty, so the consonant next door moves in.
The German instinct is the exact opposite. German inserts a glottal stop to keep word pieces apart — that little catch in ver·eisen that makes it different from verreisen. Korean has no Knacklaut at all; everything runs together, more like French les amis. If you find yourself saying "han-guk · eo" with a break, you are hearing German, not Korean.
Two things that do not slide. A batchim ㅇ stays put — it is already at the back of the throat, so 강아지 is "gang-a-ji", not "ga-nga-ji". And a batchim ㅎ simply evaporates between vowels: 좋아요 is "jo-a-yo".
A two-letter cluster splits neatly: the left letter stays where it is and the right one moves over. 읽어 = "il-geo" — suddenly both letters are audible.
Your mouth is already shaped for the nasal that follows, so the stop just gives up and joins in. German does this too, quietly: nobody actually says an·passen — it comes out "ampassen".
This one you get for free on signs. Revised Romanization writes assimilation out: the Latin line under 국민은행 says Gungmin, not Gukmin. So when you sound the Hangul out and it disagrees with the Latin, the Latin is telling you which rule fired.
This is the rule that unlocks half a dozen place names you have already seen written in Latin letters and could not connect to their Hangul.
A working shortcut for street signs. The word 로 "-ro" (road, from Lesson 1) is spelled 로 everywhere, but after a consonant-final block it is said "-no" — and the sign's Latin line will spell it that way too. 종로 Jongno, 태평로 Taepyeongno. After a vowel it stays "-ro": 세종대로 Sejongdaero.
This looks obscure until you notice which word it hits hardest: 역 , station — the highest-value single block in the whole Korean track, and it starts with ㅕ. Every station name in the country is a compound ending in 역.
One rule, every metro map. Consonant before 역 → -nyeok. An ㄹ before it → -lyeok. A vowel before it → plain -yeok. Now the station announcement you hear and the sign you read are the same word.
This is the one rule the Latin line hides from you. Revised Romanization deliberately does not write tensing: the sign says hakgyo, sikdang, Apgujeong. Rules 2, 3 and 4 you can read off the romanization; Rule 5 you have to supply yourself. That is the exact boundary of the decoder you built in Lesson 3.
There is a seventh rule you can safely ignore for reading: ㄷ or ㅌ before 이 becomes ji / chi — 같이 is said "ga-chi". It almost never shows up on signage. (Korean phonology — morphophonemics)
The rules stack, and they fire left to right. Nothing here is guesswork once you know the order.
Not in applying the rules — in not noticing that one applies. These are the shapes to watch for.
Do not over-apply. Most Korean words change nothing at all. 신촌 is just "sin-chon", 강남 is just "gang-nam", 명동 is just "myeong-dong". A rule fires only when a batchim is actually standing next to something that provokes it — most of the time it isn't.
Fourteen rounds. Each word shows two readings — the naive letter-by-letter one, and the one
a Korean actually says.
Careful: sometimes they are the same word, because no rule fires. Do not just pick the odd-looking one.
Every one of these was readable before today — but you would not have recognised the name.
| Hangul | Said / written | Where & which rule |
|---|---|---|
| 종로 | JONGNO | Central Seoul, district and main street. ㄹ → n after ㅇ. |
| 한라산 | HALLASAN | The volcano filling the middle of Jeju — visible from most of the island. |
| 신라 | SILLA | The old kingdom centred on 경주; also a big hotel brand. |
| 왕십리 | WANGSIMNI | Seoul interchange station. ㄹ→n, then p→m. |
| 독립문 | DONGNIMMUN | Seoul; a stone arch and a metro station. Three rules in one word. |
| 대학로 | DAEHANGNO | Seoul's theatre street, near Hyehwa. |
| 광안리 | GWANGALLI | Busan beach with the illuminated suspension bridge. |
| 압구정 | APGUJEONG | Gangnam neighbourhood. Written Apgujeong, said "ap-kku-jeong" — Rule 5 is invisible in Latin. |
| 서울역 | SEOULLYEOK | The main station. Note the doubled ll in the official spelling — that is Rule 4 plus Rule 3. |
| 춘천 | CHUNCHEON | Gangwon lake city — and the home of 닭갈비. Nothing changes here; it is a control. |
| Hangul | Actually said | Meaning & note |
|---|---|---|
| 학교 | HAKKYO | School. Latin line still says hakgyo. |
| 식당 | SIKTTANG | Restaurant. One of the commonest words on any Korean street. |
| 입구 | IPKKU | Entrance — versus 출구 "chulgu" exit, which stays plain. |
| 백화점 | BAEKWAJEOM | Department store. 롯데백화점, 현대백화점 — huge lit signage. |
| 국민은행 | GUNGMINEUNHAENG | KB Kookmin Bank. Yellow-and-grey branches everywhere. |
| 닭갈비 | DAKKKALBI | Stir-fried chicken. Restaurant fascias, especially around Chuncheon. A ㄺ cluster. |
| 값 | GAP | Price. Market stalls and price tags. Two letters at the bottom, one sound out. |
| 꽃집 | KKOTJJIP | Flower shop. Lesson 3's loose end, now closed. |
| 감사합니다 | GAMSAHAMNIDA | Thank you. Printed on shop doors and receipts. |
| 축하합니다 | CHUKAHAMNIDA | Congratulations. Banners outside schools in February and universities in spring. |
The romanization column here is what you would hear. The Latin under the actual sign follows Revised Romanization, which writes the assimilations but not the tensing — so expect hakgyo, sikdang, ipgu on the sign itself.
40 of 40 letters, plus the six rules that connect them. Reading Hangul is, from here on, a solved problem.
Next up (Lesson 6): no more phonetics at all. Road signs, the full address ladder, the storefront vocabulary, and — the GeoGuessr skill that pays best — telling Korean apart from Japanese and Chinese in the half-second before you have read a single word.
Twenty-one blocks, one per batchim spelling. Say the whole thing aloud, then reveal.
Split the blocks, then check whether any of the six rules fires. The answer shows the
spoken form — and, where it differs, what you would have said without this lesson.
Space to reveal
1/2/3 to score