Liaison with Compound Words: Sounds, Rules and Examples

Liaison with compound words is the Korean rule for a final consonant followed by a vowel-initial word that has its own meaning: the consonant is first reduced to its representative sound, then moved onto the vowel. So 옷 안 (inside the clothes) is [오단], while 옷이, with the particle 이, is [오시].

What you'll learn

• Say 옷이 [오시] and 옷 안 [오단] and explain why they differ.
• Decide whether the part after a final consonant is a particle or ending, or a word with its own meaning.
• Apply the two steps, reduce then link, to 꽃 위, 밭 아래, 겉옷 and 헛웃음.
• Handle the special cases 값어치, 맛없다 and the two forms of 맛있다.

Prerequisite: Korean Liaison with Particles, which covers the simple case where the consonant moves unchanged. Estimated time: 30 minutes.

What Is Liaison with Compound Words?

Liaison with compound words is the second kind of Korean liaison (연음, resyllabification), the rule that moves a final consonant to the start of a following vowel-initial syllable. The first kind happens before grammatical pieces such as particles and endings. The second kind happens before a word with its own meaning, either inside a compound or across a space in a phrase.

The difference is one extra step. Before a particle, the consonant keeps its full value: 옷 + 이 → [오시], with the [ㅅ] intact. Before a meaning word, the consonant is first reduced to one of the seven representative sounds that Korean allows at the end of a syllable, and only that reduced sound moves: 옷 + 안 → 옫 + 안 → [오단].

Article 15 of the Standard Pronunciation Rules (표준 발음법), published by the National Institute of Korean Language (국립국어원), states the rule. Its examples include 밭 아래 [바다래], 늪 앞 [느밥], 젖어미 [저더미], 맛없다 [마덥따], 겉옷 [거돋], 헛웃음 [허두슴] and 꽃 위 [꼬뒤]. The next section explains why learners find this hard.

Why English Speakers Struggle Here

English speakers struggle with this rule because English does not change a consonant according to the kind of word that follows. In English, "lot of" and "lot over" keep the same [t]. Korean asks the speaker to check the grammar of the next piece before deciding how to say the consonant.

A second problem is that the two results can look random. 꽃이 is [꼬치], but 꽃 위 is [꼬뒤]. 밭에 is [바테], but 밭 아래 is [바다래]. A learner who has just mastered particle liaison will say [꼬취] and [바타래], which sound wrong to Korean ears. The fix is a single test question, which the next section gives.

What Is a Real-Meaning Word?

A real-meaning word is a piece that carries dictionary meaning by itself, such as a noun, a verb stem or an adjective stem. Korean grammar calls it a 실질 형태소 (content morpheme). A particle or ending, by contrast, is a 형식 형태소 (functional morpheme): it adds grammar, such as subject, place or politeness, but no thing or action.

The test question is simple: could this piece appear in a dictionary as a word with its own meaning? If yes, reduce first. If it is a particle or an ending, link directly.

The place nouns 안, 위, 아래, 앞 and 옆 are the most frequent triggers, because they follow nouns in phrases such as 집 앞 (in front of the house) and 책상 위 (on the desk). With the test in hand, the two routes can be compared step by step.

How Does the Rule Differ from Particle Liaison?

The rule differs from particle liaison by adding a reduction step before the move. Particle liaison is one step; compound liaison is two. Follow these steps for any final consonant before a vowel.

1. Identify the next piece. Ask the test question: particle or ending, or a word with meaning?
2. If it is a particle or ending, move the consonant as written. 꽃 + 이 → [꼬치].
3. If it is a meaning word, reduce the consonant first. ㅅ, ㅈ, ㅊ, ㅌ and ㅎ become [ㄷ]; ㅍ becomes [ㅂ]; ㄲ and ㅋ become [ㄱ].
4. Then move the reduced sound onto the vowel. 꽃 → 꼳 → 꼬 + 뒤 → [꼬뒤].

Finals that are already representative sounds look the same on both routes. 집 앞에 (in front of the house) is [지바페], and 밥 위 (on the rice) is [바뷔], because ㅂ is its own representative sound. That is why the rule is easy to miss: it shows only with finals such as ㅅ, ㅈ, ㅊ, ㅌ, ㅍ and ㅋ.

Which Vowels Does Article 15 Name?

Article 15 names meaning words that begin with ㅏ, ㅓ, ㅗ, ㅜ or ㅟ. Meaning words that begin with 이, 야, 여, 요 or 유 follow a different rule, Korean n-insertion, which adds an [ㄴ]. So 옷 안 is [오단], but 옷 입다 (to put on clothes) is [온닙따], and 꽃잎 (petal) is [꼰닙]. When the next word starts with 이 or a y-vowel, check the n-insertion rule first. The special cases come next.

Which Words Are Special Cases?

Three groups need special care: double finals, the pair 맛있다 and 멋있다, and words with 없다. Article 15 and its note cover all three.

A double final is a batchim of two letters, such as ㅄ in 값. Before a meaning word, it is reduced to one sound, and that sound moves. Before a particle, both letters are used: 값이 is [갑씨], because ㅅ moves and becomes tense. The full double-final pattern is in liaison with double batchim.

값어치 is worth noting because 어치 is grammatically a suffix, yet Article 15 lists the word with the meaning-word cases. Learn it as a fixed item: [가버치], not [갑써치]. The most famous special case, 맛있다, needs its own section.

How Is 맛있다 Pronounced?

맛있다 (to be tasty) has two standard pronunciations: [마딛따] and [마싣따]. Article 15 gives [마딛따] as the regular form, because 있다 is a meaning word and the ㅅ of 맛 should reduce to [ㄷ]. The same article then allows [마싣따] as an accepted form. 멋있다 (to be stylish) works the same way: [머딛따] or [머싣따].

The opposite word does not share the freedom. 맛없다 (to taste bad) has only [마덥따]. [마섭따] is not standard. This asymmetry is a common quiz item and a frequent learner error.

In everyday speech you will hear [마싣따] and its polite form 맛있어요 [마시써요] very often, and [마딛따] in careful or formal speech. Both are correct. The site's separate lesson on how to pronounce 맛있어요 drills the polite forms. Next, a worked example follows the full route.

Worked Example: 옷 안

Follow these steps to say 옷 안 (inside the clothes), as in 옷 안에 (inside the clothes, location).

1. Find the final consonant. 옷 ends in ㅅ.
2. Identify the next piece. 안 means "inside". It is a noun in the dictionary, so it is a meaning word.
3. Reduce the final. ㅅ becomes its representative sound, [ㄷ]: 옫.
4. Link. [ㄷ] moves onto the vowel of 안: 오 + 단.
5. Say it as one phrase. [오단], and with the particle: 옷 안에 [오다네].

You will know it worked when 옷 안 sounds like 오 followed by 단, the same 단 as in 단어 (word), with no hiss of [ㅅ]. If you hear [오산], you have used the particle route. Then compare with 옷이 [오시] and notice that [ㅅ] returns only before the particle.

Across Word Spaces: 몇 월 and 못 와요

The same rule runs across a space whenever two words are said in one breath group. A breath group is a stretch of speech said without a pause. Two everyday examples show it.

몇 월 also helps explain a spelling puzzle. The word 며칠 (what day of the month) is not written 몇 일: by this rule 몇 일 would be read [며딜], but speakers say [며칠], so the spelling rules (Hangul Orthography, Article 27) write it as it sounds. The broader topic of rules across spaces is covered in sound changes across words.

If the speaker pauses, liaison stops. Said slowly with a break, 옷 | 안 keeps an unreleased [ㄷ] at the end of 옷 and a vowel-initial 안. This is natural in careful dictation but not in normal speech. The common mistakes below come mostly from mixing the two routes.

Common Learner Mistakes

Mistake 1: linking the full consonant before a noun. Learners often say 꽃 위 as [꼬취]. Actually 위 is a noun, so ㅊ reduces to [ㄷ] first, giving [꼬뒤].

Mistake 2: reducing before a particle. Learners who have just learned this rule sometimes say 옷이 as [오디]. Actually 이 is a particle, so the ㅅ moves unchanged: [오시].

Mistake 3: treating 맛없다 like 맛있다. Learners often say [마섭따] by analogy with [마싣따]. Actually only [마덥따] is standard for 맛없다.

Mistake 4: using the rule before 이 or 여. Learners often say 옷 입다 as [오딥따]. Actually meaning words starting with 이 sounds take n-insertion: [온닙따].

Mistake 5: moving both letters of a double final. Learners often say 값어치 as [갑써치]. Actually only one sound moves: [가버치].

These errors all come from skipping the test question. The practice set rehearses it.

Practice and Answer Key

Exercise 1. Write the spoken form.

1. 밭 아래
2. 꽃이
3. 겉옷
4. 늪 앞
5. 몇 월

Exercise 2. Particle or meaning word? Then give the spoken form.

1. 옷 + 을
2. 옷 + 안
3. 꽃 + 을
4. 헛 + 웃음

Exercise 3. Which has only one standard form: 맛있다, 멋있다 or 맛없다?

Answers.

Exercise 1: 1 [바다래], 2 [꼬치], 3 [거돋], 4 [느밥], 5 [며둴].

Exercise 2: 1 particle, [오슬]. 2 meaning word, [오단]. 3 particle, [꼬츨]. 4 meaning word, [허두슴].

Exercise 3: 맛없다, which is only [마덥따].

If you missed two or more, replay the 옷이 and 옷 안 pair and say each five times, switching between them.

Where to Go Next

The next lesson, Korean nasalization, explains why 값있는 is [가빈는] and why 몇 년 becomes [면년]. Review liaison with particles if the particle route still feels uncertain. The full group of lessons is on the Liaison (Resyllabification) page.

This lesson covers Article 15 liaison in standard Seoul speech. It does not cover n-insertion in detail, regional forms, or loanwords. The audio gives one standard pronunciation for each item, and real speakers vary in speed.

In short, liaison with compound words adds one step to ordinary liaison: before a word with its own meaning, reduce the final consonant to its representative sound, then link it.

Frequently Asked Questions

Is 맛있다 [마싣따] or [마딛따]? Both are standard. Standard Pronunciation Rules Article 15 gives [마딛따] as the regular form, because 있다 is a word with its own meaning, and it also allows [마싣따] as an accepted second form. Pick one for your own speech and expect to hear both. The same applies to 멋있다.

Why is 옷 안 [오단]? 안 (inside) is a noun with its own meaning, not a particle. Before such a word, Article 15 says to reduce the final consonant first: ㅅ becomes its representative sound [ㄷ]. Only then does it move onto the vowel, giving [오단]. Compare 옷이 [오시], where 이 is a particle.

What is the rule for 값어치? 값어치 (worth, value) is [가버치]. The double final ㅄ is reduced to one sound, [ㅂ], and only that sound moves onto 어. Article 15 treats 어치 like a word with meaning, so the ㅅ does not move as it does before the particle in 값이 [갑씨]. Article 15 lists the word in its note.

Is the rule common? Yes. Every phrase that puts a noun ending in a consonant before 안, 아래, 앞, 위 or 옆 uses it, as do compounds such as 겉옷 and 헛웃음. You will meet it daily in place phrases like 집 앞에 (in front of the house), [지바페], and 밭 아래 (below the field).

Does the rule apply when I pause between the words? No. Liaison happens only when the two words are said as one breath group. If you pause after 옷, the final stays in its own syllable as an unreleased [ㄷ], and 안 starts with a vowel. In normal speech, place phrases such as 옷 안 are said together, so [오단] is the form to learn.

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