Korean vowel pronunciation covers 21 vowel letters: ten simple vowels, such as ㅏ, ㅓ, ㅗ, ㅜ, ㅡ and ㅣ, and eleven vowels that include a glide or combine two vowels. Ten lessons here teach how each sounds, which pairs sound alike and which pairs English speakers mix up, with audio.
Key Facts
- Korean has 21 vowel letters: ten simple vowels and eleven vowels that include a glide or combine two vowels.
- The hardest pairs for English speakers are ㅓ and ㅗ, and ㅡ and ㅜ.
- For most present-day Seoul speakers, ㅐ and ㅔ sound the same, so 개 (dog) and 게 (crab) are told apart by spelling and context.
- ㅙ, ㅞ and ㅚ sound alike, and all three are close to the we in English "wet".
- ㅢ has more than one pronunciation, depending on its position in the word.
- Vowel length is marked in dictionaries, but beginners can set it aside.
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 Vowel Pronunciation?
Korean vowel pronunciation is the set of sounds that the 21 vowel letters make, together with the rules that decide how they combine. A vowel is a sound made with the mouth open and the air flowing freely. Korean vowels depend mostly on lip shape and tongue position, and not on stress or length, which is why a clear lip shape matters more than anything else.
The vowel letters fall into two groups:
| Group | Letters | Number | Where it is taught |
|---|---|---|---|
| simple vowels | ㅏ ㅓ ㅗ ㅜ ㅡ ㅣ ㅐ ㅔ ㅚ ㅟ | 10 | simple vowels, the hard pairs, same-sounding vowels (ㅚ and ㅟ with the w-vowels) |
| glide and combined vowels | ㅑ ㅕ ㅛ ㅠ ㅒ ㅖ ㅘ ㅙ ㅝ ㅞ ㅢ | 11 | y-glides, w-glides, ㅢ, diphthongs |
A simple vowel is one steady sound, and a diphthong is a vowel that moves from one position to another, as in the y-sound at the start of ㅑ. The Standard Pronunciation Rules (표준 발음법) of the National Institute of Korean Language (국립국어원) list both groups. Hear the first hard pair now.
The first clip contrasts ㅓ and ㅗ, and the second ㅡ and ㅜ. The decision table below sends each learner to the right lesson.
Where to Start with Korean Vowel Pronunciation
Start with the lesson that matches the vowel you mishear. The table sends each common situation to one lesson.
| If you... | Start with |
|---|---|
| are new to Korean vowels | Korean Simple Vowels |
| mix up 선 and 손, or 거기 and 고기 | Korean ㅓ vs ㅗ |
| mix up 그 and 구, or 글 and 굴 | Korean ㅡ vs ㅜ |
| cannot hear 개 versus 게 | Korean ㅐ vs ㅔ Pronunciation |
| wonder why different letters sound the same | Korean Vowels That Sound the Same |
| need ㅑ ㅕ ㅛ ㅠ | Korean Y Vowels ㅑ ㅕ ㅛ ㅠ |
| need ㅘ ㅝ ㅟ | Korean W Vowels ㅘ ㅝ ㅟ |
| are unsure how to say 의 | How to Pronounce Ui in Korean |
If none of the rows fits, the first lesson is the safe choice. The letters themselves are introduced in the Korean vowels lessons, and these pages build on them.
The Simple Vowels
You pronounce the simple vowels by setting the lips and the tongue for each one and holding the shape steady. The lesson Korean Simple Vowels teaches all eight simple vowel sounds with the right lip shape and one sample word for each. It is the foundation for every other lesson in this section, because the hard pairs and the glides are all built from the same eight sounds. The standard also lists ㅚ and ㅟ as simple vowels, but speakers usually pronounce them with a w-glide, so they are taught with the w-vowels.
Which Vowel Pairs Are Hardest for English Speakers?
The hardest pairs for English speakers are ㅓ and ㅗ, and ㅡ and ㅜ, because English has no vowels that match them cleanly. Two lessons treat the pairs one by one, with the lip shape as the main cue.
- Korean ㅓ vs ㅗ teaches how to say 어 and 오 with the right lips and how to choose between 선 (line) and 손 (hand), and between 거기 (there) and 고기 (meat), in audio.
- Korean ㅡ vs ㅜ teaches 으 and 우 with the right lip shape and how to choose between 그 (that) and 구 (nine), and between 글 (writing) and 굴 (oyster), in audio.
The usual error is to round the lips for ㅡ or to spread them for ㅜ. Keep the lip shape in the mirror and let the sound follow. The next group has the opposite problem: different letters that sound the same.
Why Do Some Korean Vowels Sound the Same?
Some Korean vowels sound the same because the sound distinction between them has disappeared in present-day speech, while the spelling has stayed. Two lessons cover the groups.
- Korean ㅐ vs ㅔ Pronunciation teaches ㅐ and ㅔ as one vowel and shows how to spell 개 (dog) and 게 (crab) correctly from a picture.
- Korean Vowels That Sound the Same names the three main same-sounding groups and gives a word from each. The groups include ㅐ and ㅔ, and ㅙ, ㅞ and ㅚ.
A learner can listen to the clip and still not hear a difference, which is the correct result for most speakers. The spelling must be memorized word by word. After the merged vowels come the vowels that move.
Glide and Diphthong Vowels
The glide and diphthong vowels are the vowels that start with a y-sound or a w-sound, or that glide from one vowel to another. Four lessons cover them.
- Korean Diphthongs sorts the diphthongs into y-glides, w-glides and ㅢ and teaches one example from each.
- Korean Y Vowels ㅑ ㅕ ㅛ ㅠ teaches the six y-glide vowels and separates pairs such as 어 and 여, and 오 and 요.
- Korean W Vowels ㅘ ㅝ ㅟ teaches ㅘ, ㅝ and ㅟ and explains why ㅙ, ㅞ and ㅚ sound alike.
- How to Pronounce Ui in Korean teaches the sounds of ㅢ in 의사, 희망, 민주주의 and 나의.
The vowel ㅢ is the most irregular of the group: its sound changes with its position, and it has its own lesson for that reason.
One lesson remains, and it is optional for beginners.
Do You Need to Practise Vowel Length?
Beginners usually do not need to practise vowel length. See Korean Vowel Length. Skip it until the simple vowels, the hard pairs and the glides feel steady.
Comparing the Korean Vowel Pronunciation Lessons
The table compares the ten lessons by what each fixes, the level and the headline example.
| Lesson | What it fixes | Level | Headline example |
|---|---|---|---|
| Simple Vowels | lip shape for eight simple vowels | A1 | eight sample words |
| ㅓ vs ㅗ | 선 / 손, 거기 / 고기 | A1 | 어, 오 |
| ㅡ vs ㅜ | 그 / 구, 글 / 굴 | A1 | 으, 우 |
| ㅐ vs ㅔ | spelling 개 / 게 | A1 | 개, 게 |
| Vowels That Sound the Same | same-sounding groups | A1 | three groups |
| Diphthongs | y-glides, w-glides, ㅢ | A1 | one from each |
| Y Vowels | 어 / 여, 오 / 요 | A1 | ㅑ ㅕ ㅛ ㅠ |
| W Vowels | ㅘ, ㅝ, ㅟ | A1 | ㅘ ㅝ ㅟ |
| Ui | the sounds of ㅢ | A1 | 의사, 희망, 나의 |
| Vowel Length | long and short vowels | B1 | dictionary marks |
Each published lesson has audio for its examples. After comparing, the next question is how to practise between lessons.
How Do You Practise Korean Vowel Pronunciation?
Practise Korean vowels with a mirror, a recording and minimal pairs. A mirror shows the lip shape, which is the main cue. A recording shows whether the vowel stays steady. Minimal pairs show whether you can hear the difference.
- Mirror. Say each vowel and check that the lips are rounded or spread as the lesson describes.
- Record. Say the sample words and compare the recording with the audio.
- Pairs. Use the Korean vowel minimal pairs and the vowel listening practice to check your ears.
Hearing usually improves before speaking, so test your ears first. For related problems, see the vowel mistakes page and the Korean minimal pairs section.
Study Order at a Glance
The study order runs from the simple vowels to the hard pairs, then to the merged vowels and the glides.
- Korean Simple Vowels.
- Korean ㅓ vs ㅗ.
- Korean ㅡ vs ㅜ.
- Korean ㅐ vs ㅔ Pronunciation.
- Korean Vowels That Sound the Same.
- Korean Diphthongs, then the y-glides and w-glides.
- How to Pronounce Ui in Korean.
- Korean Vowel Length: the traditional long and short vowel contrast (눈 snow vs eye).
Sound problems with consonants are in Plain, Tense and Aspirated Sounds and Hard Korean Sounds.
Audio, Review Status and Scope
The Korean vowel pronunciation lessons cover the sounds of the vowel letters and their groups. They do not cover consonants, final consonants or sound changes between words, which have their own sections, or regional vowel differences.
Every example word has an audio clip. The Korean text, romanization and audio scripts are generated drafts and still await review by a Korean specialist, and no page in this section has been human-reviewed yet. Standards used are the National Institute of Korean Language (국립국어원) Standard Pronunciation Rules (표준 발음법) and the Revised Romanization of Korean.
Frequently Asked Questions
How many vowels does Korean have? Korean has 21 vowel letters. Ten are simple vowels, such as ㅏ, ㅓ, ㅗ, ㅜ, ㅡ and ㅣ, and eleven are glide or combined vowels, such as ㅑ, ㅘ and ㅢ. Not all 21 sound different in everyday speech, because ㅐ and ㅔ merge, and ㅙ, ㅞ and ㅚ sound alike.
Which Korean vowels are hardest for English speakers? ㅓ versus ㅗ and ㅡ versus ㅜ are the hardest pairs. English has no matching vowels, so learners tend to merge them. ㅓ is an open vowel with relaxed, unrounded lips, and ㅗ is a rounded vowel. ㅡ has spread lips, and ㅜ has rounded lips. Lip shape is the key cue.
Do ㅐ and ㅔ sound different in Korean? In present-day Seoul speech, most speakers pronounce ㅐ and ㅔ the same, as a vowel like the e in English 'bed'. The spelling still differs, as in 개 (dog) and 게 (crab). Learners need to memorize which letter goes in which word, since the sound no longer tells them.
Where should I start with Korean vowel pronunciation? Start with Korean Simple Vowels, which teaches the eight simple vowel sounds and the lip shape for each. Then take the hard pairs, ㅓ and ㅗ, and ㅡ and ㅜ. If you can already pronounce the simple vowels, choose the lesson that matches the vowel you mishear.
Do I need to learn vowel length? Not at first. Standard Korean dictionaries mark some vowels as long, and the length can separate words, but many speakers today do not use it consistently. Beginners get more value from lip shape and the hard pairs. The vowel length lesson helps you decide whether to practise it later.