Nasalisation: Why κ°μ‚¬ν•©λ‹ˆλ‹€ Sounds Like κ°μ‚¬ν•¨λ‹ˆλ‹€

One of the first phrases every learner meets is not pronounced the way it is written. A stop consonant next to a nasal one becomes nasal itself, and the rule is completely regular.

8 min readΒ·

Learners usually hear κ°μ‚¬ν•©λ‹ˆλ‹€ dozens of times before they see it written, and the two do not obviously match. The written form has γ…‚; the spoken form clearly has an m.

Nothing is being slurred. Korean systematically changes a stop into a nasal when a nasal consonant follows, and once you know the rule you stop hearing it as a mismatch.

The core rule

When a syllable ends in γ„±, γ„· or γ…‚ and the next syllable begins with γ„΄ or ㅁ, the final consonant becomes the nasal made in the same place in the mouth.

The tongue and lips do not move to a new position. Only the airflow changes, routing through the nose instead of being blocked completely β€” which is easier for your mouth than the written sequence would be.

  • β€’γ„± β†’ γ…‡ : κ΅­λ¬Ό β†’ [ꢁ물], ν•™λ…„ β†’ [ν•­λ…„], ν•œκ΅­λ§ β†’ [ν•œκΆλ§]
  • β€’γ„· β†’ γ„΄ : λ°›λŠ” β†’ [λ°˜λŠ”], λ‹«λŠ” β†’ [λ‹¨λŠ”], μ˜›λ‚  β†’ [μ˜Œλ‚ ]
  • β€’γ…‚ β†’ ㅁ : μž…λ‹ˆλ‹€ β†’ [μž„λ‹ˆλ‹€], κ°μ‚¬ν•©λ‹ˆλ‹€ β†’ [κ°μ‚¬ν•¨λ‹ˆλ‹€], μ‹­λ§Œ β†’ [μ‹¬λ§Œ]

It applies to the neutralised sound, not the spelling

The rule operates on the seven representative final sounds rather than on the letter you see. Any final that neutralises to [γ„·] behaves like γ„· here.

So 옷만 is pronounced [온만], because the γ…… first neutralises to [γ„·] and then nasalises to [γ„΄]. κ½ƒλ§Œ goes the same way, giving [꼰만].

Reading the two rules in sequence β€” neutralise first, then nasalise β€” handles most cases that look complicated at first glance.

γ„Ή turns into γ„΄ after ㅁ and γ…‡

A second nasalisation pattern runs in the other direction. When γ„Ή begins a syllable after a final ㅁ or γ…‡, the γ„Ή becomes γ„΄.

μ’…λ‘œ, the Seoul district, is pronounced [μ’…λ…Έ]. 심리 comes out as [μ‹¬λ‹ˆ], and 강릉 as [κ°•λŠ₯].

This is why place names transliterated from Korean sometimes look inconsistent in English: the romanization follows the spelling in some sources and the pronunciation in others.

When both changes happen at once

The two patterns can stack. If a syllable ending in γ„± or γ…‚ is followed by one starting with γ„Ή, the γ„Ή first becomes γ„΄, and that new γ„΄ then triggers nasalisation of the stop before it.

백둜 is written with γ„± and γ„Ή but pronounced [λ±…λ…Έ]. ν˜‘λ ₯ becomes [ν˜λ…].

This looks intimidating written out, but it is the same two rules applied in order. Nothing new is involved.

The one that goes the opposite way

γ„΄ next to γ„Ή does not nasalise. It does the reverse: the γ„΄ becomes γ„Ή, giving a long lateral sound.

신라 is pronounced [싀라], μ„€λ‚  is [μ„€λž„], and 연락 is [열락]. This is lateralisation, and it is worth learning alongside nasalisation precisely because the two look similar and move in opposite directions.

A quick way to keep them apart: ㅁ and γ…‡ pull γ„Ή toward γ„΄, while γ„Ή pulls γ„΄ toward γ„Ή.

Why this matters more than it looks

Nasalisation is not an occasional exception. It runs through some of the most frequent structures in the language, including the polite ending -μŠ΅λ‹ˆλ‹€ and -γ…‚λ‹ˆλ‹€, which is why every learner meets it in their first week whether or not anyone explains it.

It also explains a persistent listening problem. If you are searching for a written γ…‚ in the stream of sound and hearing an m, you will keep failing to match what you hear to what you know. Learning the rule converts that from a mystery into an expectation.

  • β€’ν•©λ‹ˆλ‹€ β†’ [ν•¨λ‹ˆλ‹€]
  • β€’μžˆμŠ΅λ‹ˆλ‹€ β†’ [μ»μ”€λ‹ˆλ‹€]
  • β€’λ¨ΉλŠ” β†’ [λ©λŠ”]
  • β€’μž‘λ…„ β†’ [μž₯λ…„]

Frequently Asked Questions

Do Koreans notice they are doing this?

Generally not. It is automatic, and most native speakers will tell you they say κ°μ‚¬ν•©λ‹ˆλ‹€ with a γ…‚ because that is how it is written. Their mouths are doing something else.

Should I spell things the way they sound?

No. Korean orthography records the underlying form on purpose, so that ν•©λ‹ˆλ‹€ stays visibly related to ν•˜λ‹€. Writing [ν•¨λ‹ˆλ‹€] would look as odd to a Korean reader as writing "wanna" in a formal English document.

Is there any case where the rule does not apply?

Across a clear pause between separate words the change can weaken, and careful, deliberate speech sometimes resists it. Within a word or with an attached ending it is essentially exceptionless.

Practise this

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