Pronunciation Rules
Why does 감사합니다 sound like [감사함니다]? Korean pronunciation shifts along 10 rules so sounds flow naturally. Learn these, and you can pronounce any word from its spelling alone.
The 10 Sound-Change Rules
Open each card for explanations, transformation examples, and practice questions.
Liaison
When a vowel-initial syllable follows a batchim, the final consonant slides over to become the first sound of the next syllable. That is why 음악 (music) is pronounced [으막].
Tensification
The plain consonants ㄱ, ㄷ, ㅂ, ㅅ, ㅈ become the tense sounds ㄲ, ㄸ, ㅃ, ㅆ, ㅉ after certain batchim. That is why 학교 (school) is pronounced [학꾜].
Nasalization
The stop batchim [k], [t], [p] turn into the nasals [ng], [n], [m] before ㄴ or ㅁ. That is why 감사합니다 (thank you) sounds like [감사함니다].
Lateralization
When ㄴ and ㄹ sit next to each other, the ㄴ turns into ㄹ so both are pronounced [ll]. That is why 연락 (contact) is pronounced [열락].
Palatalization
A ㄷ or ㅌ batchim followed by 이 or 히 turns into ㅈ or ㅊ. That is why 같이 (together) is pronounced [가치].
Aspiration
When ㅎ meets ㄱ, ㄷ, ㅂ, or ㅈ, the two merge into the aspirated sounds ㅋ, ㅌ, ㅍ, ㅊ. That is why 축하 (congratulations) is pronounced [추카].
ㅎ Deletion
When a vowel follows a ㅎ batchim, the ㅎ silently disappears. That is why 좋아요 (I like it) is pronounced [조아요].
Final Neutralization
In the final position only 7 sounds are allowed: ㄱ, ㄴ, ㄷ, ㄹ, ㅁ, ㅂ, ㅇ. That is why 꽃 becomes [꼳] and 부엌 becomes [부억].
Double Batchim Pronunciation
Each of the 11 double batchim pronounces only one of its two consonants. 닭 is [닥], 삶 is [삼] — a rule decides which sound survives.
ㄴ Insertion
In a compound word, when the first part ends in a consonant and the second begins with 이·야·여·요·유, an ㄴ is inserted between them. That is why 꽃잎 (petal) is pronounced [꼰닙].
Frequently Asked Questions
Why does Korean have pronunciation rules?
In Korean, spelling and pronunciation do not always match. Words change according to rules so sounds flow naturally — 감사합니다 becomes [감사함니다], 학교 becomes [학꾜]. Knowing these rules lets you pronounce any word correctly just from its spelling.
How many pronunciation rules are there?
There are 10 core rules every learner should know: liaison, tensification, nasalization, lateralization, palatalization, aspiration, ㅎ deletion, final neutralization, double-batchim pronunciation, and ㄴ insertion. All are codified in the National Institute of Korean Language’s standard pronunciation rules.
Which rule should I learn first?
Start with liaison — it is the easiest and most common, a natural carry-over of the batchim into the next vowel. Then learn the clear-cut rules like nasalization and lateralization, and save the condition-heavy ones (tensification, palatalization) for later.
Do I have to memorize all these rules?
Listening and speaking aloud works faster than rote memorization. K-dramas and K-pop are full of these changes, so once you understand a rule, exposure to real speech makes it second nature.
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