Korean Lateralization Rules: Sounds, Rules and Examples

What you will learn

• Apply the rule to 신라, 설날, 편리, 난로 and 대관령 and say them aloud.
• Recognise both directions of the change: ㄴ + ㄹ and ㄹ + ㄴ.
• Pronounce the long [ㄹㄹ] as a held l, never as an r.
• Spot the main exception pattern and know where it is taught.

Before you start: review Korean ㄹ Nasalization, the change in which ㄹ becomes ㄴ after other consonants. Time: about 25 minutes with audio.

Key Facts

• When ㄴ meets ㄹ in either order, the ㄴ is pronounced ㄹ, so both letters sound as a long [ㄹㄹ].
• ㄴ before ㄹ: 신라 is [실라], 난로 is [날로] and 편리 is [펼리].
• ㄹ before ㄴ: 설날 is [설랄] and 칼날 is [칼랄].
• The double [ㄹㄹ] is a held l with the tongue tip on the ridge behind the teeth, not an r.
• The rule is Article 20 of the Standard Pronunciation Rules (표준 발음법), where it is called 유음화 (liquidization).
• Some Sino-Korean words go the other way, ㄴ + ㄹ → [ㄴㄴ]: 생산량 is [생산냥]. These exceptions have their own lesson.

Last updated: 2026-10-09. The Korean text, romanization and audio scripts on this page are generated drafts that still await review by a Korean specialist.

What Are the Korean Lateralization Rules?

The Korean lateralization rules are one sound change seen from two sides: ㄴ next to ㄹ becomes ㄹ. A lateral is a sound made with the tongue tip touching the roof of the mouth while air flows around the sides of the tongue, like the English l. ㄹ at the end of a syllable is a lateral, and the rule makes ㄴ copy it.

The Korean name 유음화 means "becoming a liquid". In phonetics, a liquid is a smooth consonant such as l or r, and ㄹ is the only liquid in Korean. English textbooks use both names, lateralization and liquidization, for the same rule.

Revised Romanization (RR) follows the spoken form, so 신라 is Silla and 설날 is Seollal, both with a double l. The official RR spellings on signs and maps are a free check on your pronunciation. RR remains a learning aid here; the Hangul and the bracketed forms are the reference. English speakers usually have trouble with this rule for one specific reason.

Why English Speakers Say "Shin-Ra"

English speakers tend to read 신라 as "shin-ra" because they pronounce each letter as written. In English, n followed by r is easy, as in "Henry" or "unreal". In Korean, ㄴ followed by ㄹ is not allowed in speech, and the combination is repaired by turning ㄴ into ㄹ.

A second problem is the sound of ㄹ itself. At the start of a syllable, a single ㄹ is a quick flap, close to the t in American "water", and many learners hear it as r. In [실라], however, the ㄹ is doubled, and a double ㄹ is always a clear l. Saying "shin-ra" gets both the ㄴ and the ㄹ wrong.

Once you know the trigger, the fix is mechanical. The next section sets out the rule in both directions.

What Does Liquidization Do?

Liquidization turns ㄴ into ㄹ when ㄴ and ㄹ are neighbours across a syllable boundary. The ㄹ can come second, as in 신라, or first, as in 설날. In both cases the result is the same long [ㄹㄹ]. Article 20 of the Standard Pronunciation Rules (표준 발음법), published by the National Institute of Korean Language (국립국어원), states the rule with both orders.

The terms regressive and progressive are only labels for direction. What matters in speech is that ㄹ always wins. The two directions appear in different kinds of words, so each gets its own section, starting with ㄴ before ㄹ.

ㄴ before ㄹ: 신라, 난로, 편리

When a block ends in ㄴ and the next block starts with ㄹ, the ㄴ becomes ㄹ. This is the direction you meet most in Sino-Korean words, which are words built from Chinese characters (hanja). Many hanja readings end in ㄴ (신, 편, 연, 관, 원), and many start with ㄹ (라, 리, 락, 래, 로).

These are everyday words. 연락하세요 (please get in touch) is [열라카세요], with liquidization and aspiration in one phrase. 원래 is used constantly in conversation to mean "originally" or "by nature". The opposite direction appears in a different set of words.

ㄹ before ㄴ: 설날, 칼날

When a block ends in ㄹ and the next block starts with ㄴ, the ㄴ becomes ㄹ. This direction is common in native Korean compounds, where two native words are joined, and in a few verb forms, though Sino-Korean words such as 실내 (indoors) show it too.

Verb stems ending in ㄾ or ㅀ also trigger it before endings with ㄴ: 뚫는 (drilling) is [뚤른], 핥네 (it licks) is [할레] and 앓는 (being ill) is [알른]. In these forms the second letter of the double batchim drops and the remaining ㄹ changes the ㄴ. With both directions laid out, a natural question is which one learners meet more.

Which Direction Is More Common?

Neither direction can be called more common without a corpus count, and this lesson does not invent one. What can be said is that the two directions live in different parts of the vocabulary. ㄴ + ㄹ mostly appears inside Sino-Korean words, while ㄹ + ㄴ mostly appears in native compounds, number phrases and some verb forms.

• Formal and written vocabulary (news, signs, textbooks): expect ㄴ + ㄹ, as in 편리, 관리 and 연락.
• Everyday native compounds: expect ㄹ + ㄴ, as in 설날, 칼날 and 물냉면.
• Numbers before a counter: expect ㄹ + ㄴ across the word space, as in 일 년 [일련] (one year) and 칠 년 [칠련] (seven years), said as one unit.

For speaking, the practical point is that both directions give the same sound, so one articulation covers both. That articulation is the next topic.

How Is the ㄹㄹ Pronounced?

The double [ㄹㄹ] is pronounced as a held l. The tongue tip touches the ridge just behind the upper front teeth and stays there across the syllable break, while air flows around the sides of the tongue. It is close to the l-l in "full load" said without a pause.

1. Say the first vowel, for example the 시 of 신라.
2. Raise the tongue tip to the ridge behind the teeth and hold it: [실].
3. Keep the tongue in place for a moment longer than a single l.
4. Release into the next vowel: [라]. The whole word is [실라].

A useful test is to compare 나라 (country) and 날라 (carry, as in 날라요). In 나라 the single ㄹ is a quick flap. In 날라 the tongue stays on the ridge, giving a long l. Getting [ㄹㄹ] right is covered in depth in the ㄹㄹ sound lesson. Place names give plenty of real-world practice.

Place Names That Show the Rule

Korean place names are a reliable source of lateralization, and their official romanized spellings show the result. Road signs, train stations and maps use Revised Romanization, which writes the spoken [ㄹㄹ] as ll.

The name 전라도 is a good check: the region is spelled Jeolla in English, never Jeonra. If you know the English spelling of a place, you often already know its pronunciation. Not every ㄴ + ㄹ word follows the rule, though.

What Words Are Exceptions?

Some Sino-Korean words turn ㄹ into ㄴ instead, giving [ㄴㄴ] rather than [ㄹㄹ]. 생산량 (production volume) is [생산냥], 의견란 (comment column) is [의견난] and 공권력 (state authority) is [공꿘녁]. Article 20 of the Standard Pronunciation Rules lists these as a separate group.

The pattern behind most exceptions is a word that ends in ㄴ plus a suffix-like hanja that begins with ㄹ, such as -량 (amount), -란 (column), -력 (power) or -료 (fee). The two parts feel like separate words to speakers, so ㄹ nasalization applies instead of liquidization. The full list is in liquidization exceptions.

Loanwords are a second limit. A word such as 온라인 (online) is heard both with and without the change, and the standard rule was not written for loanwords. Check the Standard Korean Language Dictionary (표준국어대사전) when a loanword matters. The regular case, however, is by far the one to master first, and the worked example shows it step by step.

Worked Example: 신라

The name 신라 is the hanja syllable 신 plus 라, and it is spoken [실라]. It is the classic example of the Korean lateralization rules because the official spelling, Silla, already shows the answer.

1. Split into blocks: 신 / 라.
2. Mark the final of the first block: 신 ends in ㄴ.
3. Mark the start of the next block: 라 starts with ㄹ.
4. Apply the rule: ㄴ next to ㄹ becomes ㄹ, so 신 is said [실].
5. Join the two ㄹ sounds: the tongue stays on the ridge, giving one long l.
6. Say the whole word: [실라], sil-la.

You will know it worked when your tongue does not leave the ridge between 실 and 라 and there is no n sound at all. If you hear "shin" or a flapped r, start again from step 4. The mistakes below are the usual reasons for a wrong result.

Common Learner Mistakes

Learners often read ㄴ and ㄹ letter by letter. The mistakes below come from that habit.

• Mistake 1: keeping the ㄴ. Learners often say *[신라]. Actually the ㄴ must become ㄹ, because Article 20 does not allow ㄴ next to ㄹ in standard speech.
• Mistake 2: saying r. Learners often produce "shil-ra". Actually a double ㄹ is always an l, because the tongue holds its contact with the ridge.
• Mistake 3: only one direction. Learners often apply the rule to 신라 but not to 설날. Actually the rule works in both orders, so 설날 is [설랄].
• Mistake 4: writing the sound. Learners often write 실라 or 설랄 in dictation. Actually the spelling stays 신라 and 설날, because the change is only in speech.
• Mistake 5: forcing [ㄹㄹ] on every word. Learners who have just learned the rule often say *[생살량] for 생산량. Actually suffix-like hanja such as -량 trigger the exception [생산냥].

Expert tip: when a word you know from English has a double l in its spelling, such as Seollal, Silla or Hallasan, use it as a pronunciation key. The practice set tests the rule on new words.

Practice and Answer Key

Write the spoken form of each word in brackets, then say it aloud.

1. 신라
2. 설날
3. 편리
4. 난로
5. 대관령
6. 연락
7. 칼날
8. 한라산
9. 실내
10. 관리

Answer key

1. 신라 → [실라]
2. 설날 → [설랄]
3. 편리 → [펼리]
4. 난로 → [날로]
5. 대관령 → [대괄령]
6. 연락 → [열락]
7. 칼날 → [칼랄]
8. 한라산 → [할라산]
9. 실내 → [실래]
10. 관리 → [괄리]

Nine or ten correct means the rule is secure. If you missed 2, 7 or 9, practise the ㄹ + ㄴ direction again; it is the one learners most often forget.

Where to Go Next

The next lesson, Korean Liquidization Exceptions, explains words like 생산량 [생산냥] and 의견란 [의견난], where ㄹ becomes ㄴ instead. Return to the Liquidization section for an overview, and compare this rule with the opposite pattern in ㄹ nasalization.

This lesson covers the regular Korean lateralization rules in standard Seoul speech, in both directions. It does not cover the full exception list, regional pronunciation, or loanwords in detail. The audio shows one standard pronunciation, and real speakers vary in speed and in how long they hold the [ㄹㄹ].

Frequently Asked Questions

How do you say 신라? Say [실라]. The ㄴ of 신 comes before the ㄹ of 라, so it turns into ㄹ and the two sounds join as a long l. Revised Romanization writes Silla, as in the Silla kingdom (traditionally dated 57 BCE to 935 CE). Avoid shin-ra; Korean speakers hear sil-la with the tongue held on the ridge.

Why is 설날 [설랄]? 설날 (Lunar New Year) is [설랄] because the ㄹ of 설 comes first and changes the ㄴ of 날 into ㄹ. This is the progressive direction of the rule: the first sound changes the second. Revised Romanization writes Seollal, so even the English spelling of the holiday shows the double l.

Is 편리 [펼리]? Yes. 편리 (convenience) is [펼리]. The ㄴ of 편 meets the ㄹ of 리 and becomes ㄹ. The same word appears in 편리하다 (to be convenient) [펼리하다] and 편리해요 [펼리해요]. Revised Romanization writes pyeolli. The spelling keeps ㄴ, so dictation needs care.

How is 한라산 pronounced? 한라산, the mountain on Jeju Island, is pronounced [할라산]. The ㄴ of 한 meets the ㄹ of 라 and becomes ㄹ. Revised Romanization writes Hallasan, which is the spelling on maps and road signs. The final 산 means mountain, so the name is literally Halla Mountain.

Does lateralization apply to loanwords? Not reliably. Article 20 describes native and Sino-Korean words, and loanwords such as 온라인 (online) are heard both with and without the change. Treat loanwords case by case and check the Standard Korean Language Dictionary (표준국어대사전). The exceptions lesson discusses the most common ones.