The Final Consonant Slides Over: Korean Liaison Rules in One Read

Korean final consonants usually stop instead of releasing fully. But there's exactly one case where a final consonant produces its full sound: when a vowel follows it. This is called liaison, and it's the key rule that makes Korean flow like water.

Final consonant + vowel = it slides over

When a syllable starting with a vowel follows a final consonant, that consonant doesn't stay put - it slides into the first-sound slot of the next syllable.

Spelling	Pronunciation	What happened
꽃이	[꼬치]	ㅊ slid in front of '이'
옷을	[오슬]	ㅅ slid in front of '을'
밥을	[바블]	ㅂ slid in front of '을'
집에	[지베]	ㅂ slid in front of '에'

What matters here: when the consonant slides over, it comes out as its original letter, not the 7 representative sounds. '꽃' on its own is [꼳], but in '꽃이' the ㅊ revives and it becomes [꼬치].

A final consonant stops when it stands alone, but revives and slides over when it meets a vowel.

A syllable starting with 'ㅇ' is the signal

Liaison happens most reliably when the next syllable starts with the silent ㅇ - as in '이, 을, 에, 은, 아'. Since ㅇ is an empty sound slot, the preceding final consonant naturally fills it.

• 한국어 → [한구거] (ㄱ moves into '어')
• 발음 → [바름] (ㄹ moves into '음')
• 음악 → [으막] (ㅁ moves into '악')

Every time a particle ('이/을/에/은') attaches, liaison kicks in - so you'll meet it in almost every sentence you speak.

Consonant assimilation: the final consonant turns nasal

When a consonant follows the final consonant, the story changes. The final consonant can take on the following one and shift to another sound, especially a nasal (ㄴ, ㅁ, ㅇ). This is consonant assimilation.

• 국물 → [궁물] (ㄱ → ㅇ, matching the following ㅁ)
• 십만 → [심만] (ㅂ → ㅁ)
• 신라 → [실라] (ㄴ → ㄹ)

Trying to memorize the rules is endless. Instead, say these words out loud and you'll feel your mouth slide naturally toward the nasal sound. The pronunciation shifts because your tongue and lips look for the easier path.

Three sentences to say today

1. 꽃이 예뻐요 - [꼬치 예뻐요]
2. 밥을 먹어요 - [바블 머거요]
3. 한국어를 배워요 - [한구거를 배워요]

Say each once slowly, then once at a natural pace. The goal is to catch the moment the final consonant slides over - with your ears.

Linked sounds only stick when you say them

You'll never spot liaison from the letters alone; you have to learn it by sound. So we built a practice app that listens as you repeat a sentence and points out where sounds linked and where they broke. Building a sense of speaking in "sound units" rather than "letter units" is where natural Korean begins.

Stop chopping each final consonant off crisply - let it flow into the following vowel. The moment you do, Korean sounds far smoother.