Korean palatalization (구개음화, gugaeeumhwa) is the sound change in which a final ㄷ or ㅌ is spoken as ㅈ or ㅊ when the suffix or particle 이 comes next. It is why 같이 is said [가치] and 굳이 is said [구지]. Three lessons in this section teach the rule, the ㄷ and ㅌ cases, and the cases with 히.
Last updated: 2026-10-09. The Korean text, romanization and audio scripts in this section are generated drafts that still await review by a Korean specialist.
What Is Korean Palatalization?
Korean palatalization is a spelling-to-speech change in which a tooth-ridge consonant moves back toward the hard palate. The hard palate is the roof of the mouth behind the ridge. The vowel 이 is made with the tongue high and forward, close to the palate. The consonants ㄷ and ㅌ are made on the ridge behind the teeth. When the two meet across a suffix boundary, the consonant slides toward the vowel and becomes ㅈ or ㅊ, which are made nearer the palate.
The table shows the pattern with four common words.
| Written | Spoken | Meaning | What changes |
|---|---|---|---|
| 같이 | [가치] | together | ㅌ becomes ㅊ before the suffix 이 |
| 굳이 | [구지] | insistently, necessarily | ㄷ becomes ㅈ before the suffix 이 |
| 밭이 | [바치] | the field (subject) | ㅌ becomes ㅊ before the particle 이 |
| 마디 | [마디] | a joint, a knot | nothing: 디 is part of the root |
The last row matters as much as the first three. The rule needs a boundary between a stem or noun and the 이 attached to it. A quick test is to ask whether the part before 이 has a meaning of its own in this word: 같- is the stem of 같다 (to be the same), 굳- is the stem of 굳다 (to harden) and 밭 is a noun, but in 마디 and 잔디 the 디 is just the second syllable of one root. Loanwords such as 티 (tee) and 파티 (party) stay [티] for the same reason: the 티 is part of the word, not a suffix. Within Standard Korean the change is obligatory: [가치] is the standard pronunciation of 같이, and [가티] is not. The next section turns that test into a choice of lesson.
Where Should You Start with Korean Palatalization?
Start with the overview lesson unless you already know the suffix test. The table sends each learner situation to one lesson.
| If you want to... | Start with |
|---|---|
| see the whole rule with twelve words, six that change and six that do not | Korean Palatalization Examples |
| say 굳이, 같이, 끝이 or 붙이다 correctly | Korean ㄷ ㅌ Palatalization |
| say 닫히다, 굳히다 or 묻히다 | Korean ㄷ ㅎ Palatalization |
A short checklist answers "does this word palatalize?" for most beginner words.
- Does the block before the 이 end in ㄷ or ㅌ?
- Is the 이 a suffix or a particle, attached to a stem (같-, 굳-) or a noun (밭, 끝)?
- If both answers are yes, say [지] or [치]. If either answer is no, leave the consonant alone.
Palatalization builds on the final sounds taught in Batchim Representative Sounds. With the order settled, each lesson gets a short description below.
The Rule: Palatalization Overview
Korean Palatalization Examples is the overview lesson. It teaches 같이, 굳이, 밭이 and 해돋이 (sunrise), and it shows the contrast between 밭이 [바치] with the particle and 밭 안 with a separate word. It also gives a list of words that never change, such as 마디, 잔디 and 어디.
It also answers a question learners ask often: whether Revised Romanization shows the change. It does, because Revised Romanization writes the spoken form, so 같이 is written gachi. The ㄷ and ㅌ cases are the heart of the rule, so they have a lesson of their own.
When Does ㄷ or ㅌ + 이 Change?
A final ㄷ or ㅌ changes whenever the next syllable is a suffix or particle 이. This is the most frequent case in everyday Korean, because 이 is both a common adverb suffix and the subject particle.
Korean ㄷ ㅌ Palatalization teaches 굳이, 같이, 끝이, 붙이다 and 곧이듣다 (to take at face value). It lists which suffixes trigger the rule, explains why 옷이 [오시] is liaison and not palatalization, and drills ten common cases. Another suffix works in a similar way, and it brings a second rule into play.
What about ㄷ + 히?
The suffix 히 after ㄷ is spoken [치]. In 닫히다 (to be closed), two rules work in order: the ㄷ and ㅎ fuse into ㅌ, as in aspiration, and the ㅌ before 이 then becomes ㅊ.
Korean ㄷ ㅎ Palatalization teaches 닫히다, 굳히다, 묻히다 and 걷히다 with ㅊ, and shows how to explain both steps. The three lessons can be compared in one table.
Comparing the Korean Palatalization Lessons
The table compares the three lessons by what each fixes, level, time and audio.
| Lesson | What it fixes | Level | Time | Audio |
|---|---|---|---|---|
| Palatalization Examples | the rule, its limits, 마디 versus 같이 | A2 | 25 min | 8 clips |
| ㄷ ㅌ Palatalization | 굳이, 같이, 끝이, 붙이다 | A2 | 25 min | 11 clips |
| ㄷ ㅎ Palatalization | 닫히다, 굳히다, 묻히다 | A2 | 25 min | with audio |
Most learners need the overview and the ㄷ ㅌ lesson first, because 같이 and the particle 이 appear in the earliest sentences. The ㄷ ㅎ lesson adds a smaller group of verbs. A short routine then turns the rule into a habit.
How Do You Practise Korean Palatalization?
Practise by predicting the spoken form before you press play.
- Read 같이, 굳이, 밭이, 끝이 and 닫히다 aloud with the changed consonant.
- Press each audio button and compare your version with the recording.
- Read 마디, 잔디 and 어디 and keep the ㄷ.
- Record yourself on a phone and check whether your 치 and 지 are made with the tongue flat and forward, not with a strong t or d.
Revised Romanization writes the spoken form (gachi, guji), so the romanization of palatalized words is a reliable guide here, unlike for tensification. For the full set of rules, see Korean pronunciation rules, and for the romanization system, see Korean romanization.
Study Order at a Glance
Study the lessons in this order: Palatalization Examples, ㄷ ㅌ Palatalization, then ㄷ ㅎ Palatalization. The first two cover nearly every beginner word, and the third adds the verbs with 히. A learner who finishes the first two can predict the spoken form of most words that end in ㄷ or ㅌ before 이.
Audio, Review Status and Scope
The Korean palatalization section covers the rule in Standard Korean (표준어), the Seoul-based standard in the National Institute of Korean Language (국립국어원) rules. It does not cover regional dialects, where some speakers keep ㄷ and ㅌ before 이, and it does not cover intonation. All Korean text, romanization and audio are generated drafts that still await review by a Korean specialist, and the audio shows one standard pronunciation.
Related Sections
Korean palatalization is one of eight rules in the section on Korean pronunciation rules. The rule that sits closest to it is Korean liaison, which moves a final consonant to the next vowel without changing it. Together they explain how every Korean learner should read the words that end in ㄷ or ㅌ plus 이.
Frequently Asked Questions
What is palatalization in Korean? Palatalization (구개음화) is the change of a final ㄷ or ㅌ into [ㅈ] or [ㅊ] when the suffix or particle 이 follows, or into [ㅊ] before the suffix 히. The tongue moves from the ridge behind the teeth toward the hard palate, so 같이 is spoken [가치].
Why is 같이 pronounced 가치? 같이 is the stem 같 plus the suffix 이. The final ㅌ moves to the next syllable, and ㅌ before the vowel 이 is spoken as [ㅊ]. Korean writes the stem unchanged, so the spelling shows 같이 while the mouth says [가치]. Revised Romanization writes the spoken form: gachi.
Does 마디 palatalize? No. In 마디 (a joint or knot), the 디 is part of the word root, not a suffix or particle. The rule needs a morpheme boundary between the ㄷ or ㅌ and the 이. Inside a root, ㄷ stays [ㄷ], so 마디 is [마디], and 잔디 (lawn) and 어디 (where) stay unchanged too.
Which suffixes trigger palatalization? Two suffixes trigger it: 이 (as in 굳이, 해돋이 and 붙이다) and 히 (as in 닫히다 and 굳히다). The subject particle 이 triggers it after a ㅌ final, as in 밭이 [바치]. Other particles, such as 에 in 밭에 [바테], do not trigger it.