How to Pronounce Ui in Korean: Sounds, Rules and Examples

How to pronounce ui in Korean depends on where the vowel ㅢ sits: say [의] at the start of a word (의사), [이] after a consonant (희망 [히망]), [의] or [이] in later syllables (민주주의), and [의] or [에] for the possessive particle (나의). The spelling never changes; only the sound does.

What you'll learn

• Make the full [의] sound as one syllable, not two.
• Decide which of the four pronunciations of ㅢ a word needs, from its position alone.
• Say 의사, 희망, 민주주의 and 나의 correctly and explain each choice.
• Mark every ㅢ in a sentence and predict how it sounds.

Prerequisites: you can say ㅡ and ㅣ clearly (see Korean Simple Vowels). Estimated time: 20 minutes.

What Is ㅢ (ui) in Korean?

ㅢ (ui) is the Korean vowel letter made of ㅡ (eu) and ㅣ (i), and it is the Korean vowel whose sound depends most on its position in the word. Hangul writes it as one letter, as in 의 (written with the silent ㅇ in front). You can see how the letter ㅢ is written and stroked in the Hangul lessons.

Most Korean vowels keep one sound everywhere. ㅏ in 아, 가 and 사 is always the a of "father". ㅢ is different: the same letter is [의] in 의사, [이] in 희망 and, for many speakers, [에] in 나의. This is not a dialect feature or a mistake. The Standard Pronunciation Rules (표준 발음법), published by the National Institute of Korean Language (국립국어원), describe all of these forms in Article 5.

How Do You Make the Full [의] Sound?

The full [의] sound is a quick glide that starts with the tongue in the ㅡ position and ends in the ㅣ position, inside one syllable. Linguists call a vowel that moves like this a diphthong.

1. Say ㅡ: spread your lips flat, as in a slight smile, and keep the back of your tongue high.
2. Without stopping the voice, slide the tongue forward to ㅣ, the ee of "see".
3. Make the slide fast. The ㅡ part is short; most of the time is spent on ㅣ.
4. Keep it as one beat. 의사 has two syllables, 의 and 사, not three.

You'll know it works when 의 sounds like one short syllable that starts "flat" and ends in a clear ee. If you hear "eu-ee" as two beats, shorten the first part. The sound belongs to the family of Korean diphthongs, but its glide is unusual: it starts from ㅡ, while the others start from a y or w movement.

Why English Speakers Struggle with ㅢ

English speakers struggle with ㅢ for two reasons: the sound has no English model, and romanization makes it look like two vowels. English has no glide from a flat "oo" with spread lips into "ee". Learners therefore replace it with something familiar, such as "wee" (with rounded lips) or "oo-ee" (in two syllables).

The second problem is the spelling ui. An English reader sees u and i, says "oo-ee", and applies it to every word. That gives [희망] for 희망, which Korean listeners hear as overly careful or foreign. The fix is to learn the four positions as a rule, which the next four sections do in order: start of the word, after a consonant, later syllables, and the particle.

How Is ㅢ Pronounced at the Start of a Word?

At the start of a word, ㅢ is pronounced as the full glide [의]. This is the only position where the full sound is required by the standard. Words that begin with 의 are common, so this is where you should practise the glide first.

"Start of a word" means the first syllable, with no consonant before ㅢ. The silent ㅇ in 의 does not count as a consonant, because it has no sound. In fast, casual speech, some speakers shorten word-initial 의 toward [으], so 의자 can sound close to [으자]. That form is not standard. Learn the full glide first; you will recognize the shortened form when you hear it.

What Happens to ㅢ after a Consonant?

After a consonant, ㅢ is always pronounced [이]. Article 5 of the Standard Pronunciation Rules states this without exceptions: when a syllable starts with a consonant sound and has ㅢ as its vowel, say [이]. Unlike the other positions, there is no allowed alternative.

ㅎ is the consonant that learners notice most, because 희 appears in many words and names: 희망, 희다 (to be white) [히다] and 유희 (play) [유히]. The rule is simple to apply: if you can see a consonant letter other than silent ㅇ in front of ㅢ, the sound is [이]. Why does Korean simplify here? A glide from ㅡ to ㅣ right after a consonant is hard to make clearly, and over time speakers dropped the ㅡ part. The spelling kept the older form.

How Is ㅢ Pronounced in Later Syllables?

In a later syllable with no consonant before it, ㅢ is pronounced [의] by the standard, and [이] is also allowed. Such syllables are written 의 with the silent ㅇ, as in the last syllable of 민주주의. Both pronunciations are correct; you can choose.

The word 의의 is a good test: the first 의 starts the word and must be [의], while the second may be [의] or [이]. In everyday conversation, the [이] forms are very common, especially in fast speech. In news reading and formal speeches, the full [의] is also natural. A learner who uses [의] here will always be correct, so this is the position where you can relax.

How Is Possessive 의 Pronounced?

The possessive particle 의, meaning "of" or "'s", is pronounced [의] by the standard, and [에] is also allowed. A particle is a small grammar word attached to the end of a noun. 의 joins two nouns to show possession, as in 나의 책 (my book) or 친구의 집 (a friend's house). Its grammar is taught under the possessive particle 의 in Korean grammar.

The [에] pronunciation is accepted by the Standard Pronunciation Rules, and it is very common in conversation, but you never have to use it. Two cautions apply. First, the particle 의 is different from the particle 에 (at, to) in writing, so do not write 에 for 의 because of the sound. Second, after a noun ending in a consonant, the consonant moves forward by liaison: 한국의 becomes [한구긔] or [한구게]. In spoken Korean, possession is also often shown with no particle at all, as in 친구 집 (a friend's house).

How to Pronounce Ui in Korean: the Quick Rule

The quick rule for how to pronounce ui in Korean is a three-question check. Run it on any ㅢ before you say the word.

1. Is there a consonant letter (not silent ㅇ) in front of ㅢ? If yes, say [이]: 희망 [히망]. Stop here.
2. Is it the first syllable of the word? If yes, say the full glide [의]: 의사 [의사].
3. Is it the possessive particle? If yes, say [의] or [에]: 나의 [나의] or [나에]. Otherwise, it is a later syllable: say [의] or [이], as in 회의.

A rule of thumb: beginners make most errors at step 1, because the letter ㅢ looks like it should be "full". Train that step until 희 sounds like 히 to you, and the rest follows.

Worked Example: 의사의 희망

The phrase 의사의 희망 (the doctor's hope) contains three of the four positions, so it is a complete test in four syllable groups.

1. 의 in 의사. No consonant in front, first syllable of the word: the full glide [의].
2. 사. An ordinary syllable: [사].
3. 의 after 의사. It is the possessive particle: [의] by the standard, [에] allowed.
4. 희 in 희망. ㅎ is a consonant in front of ㅢ: [히]. Then 망 is [망].

Spoken: [의사의 히망], or with the allowed particle form, [의사에 히망].

You'll know you have it when you say the first 의 with a clear glide, and 희망 with a plain [히] and no trace of ㅡ. If both sound the same to you, return to the steps in "How do you make the full [의] sound?"

Tricky Words: 협의, 강의의 and Names

A few words look tricky because ㅢ meets a consonant through liaison, or because the same word holds two positions. Liaison is the rule that moves a final consonant into a following syllable that starts with a vowel.

• 협의 (discussion). The ㅂ of 협 moves forward, so the spoken form starts the second syllable with a consonant: [혀븨] is standard, and [혀비] is allowed. The rule treats this 의 as a later-syllable 의, not as ㅢ after a consonant.
• 강의의 (of the lecture). The second 의 is a later syllable ([의] or [이]), and the third is the particle ([의] or [에]): [강의의] or [강이에].
• Names. Names with 희, such as 희진 or 정희, follow the consonant rule and are said [히진] and [정히]. People may romanize them as Heejin or Hui-jin, but the sound is [히].

The Standard Korean Language Dictionary (표준국어대사전) gives the standard pronunciation of single words in brackets when you are unsure. These cases are uncommon at the A1 level, so treat them as recognition practice rather than words to memorize.

Why Does Romanization Write Ui Every Time?

Romanization writes ui every time because the Revised Romanization of Korean (2000) has an explicit rule: ㅢ is written ui even when it is pronounced [이]. That is why 희망 is huimang, 무늬 is munui and 의사 is uisa. The system records the spelling of this vowel, not its sound.

The spelling eui is a different case. It is not part of Revised Romanization, but it appears in many personal names and older materials, such as Euijin. English readers sometimes guess "ay-wee" for eui, which is wrong in every position. Treat ui, eui and ŭi (used in the older McCune-Reischauer system) as three spellings of one letter, and get the sound from the position rule.

Common Learner Mistakes

Mistake 1: saying [의] after a consonant. Learners often assume 희망 starts with the full glide; actually it is [히망], because ㅢ after a consonant is always [이]. Fix: cover the ㅡ part of the letter with your finger and read 히.

Mistake 2: two syllables for one. Learners often say 의사 as "eu-ee-sa"; actually 의 is one syllable, because the glide is part of a single vowel. Fix: tap once on the table for 의 and once for 사.

Mistake 3: rounding the lips. Learners often say "wee-sa" for 의사; actually the lips stay spread for ㅡ, because ㅡ is unrounded. Fix: smile slightly through the whole word.

Mistake 4: writing 에 for the particle. Learners who hear 나의 as [나에] sometimes write 나에; actually the spelling is always 의, because [에] is only an allowed pronunciation.

Mistake 5: believing [에] is required. Learners often think the particle must be [에] to sound natural; actually [의] is the standard and is always correct, because the rules list [에] only as an allowed variant.

Practice and Answer Key

Exercise 1. Write the spoken form. Where two forms are correct, write both.

1. 의견
2. 흰색
3. 회의
4. 너의 (your)
5. 무늬

Exercise 2. Mark each ㅢ in the sentence and label its position (start, after consonant, later, particle).

우리의 의사 선생님은 회의에서 희망을 이야기했어요. (Our doctor talked about hope at the meeting.)

Exercise 3. True or false: in 띄어쓰기, ㅢ may be said as the full glide.

Answers.

Exercise 1: 1 [의견]. 2 [힌색]. 3 [회의] or [회이]. 4 [너의] or [너에]. 5 [무니].

Exercise 2: 우리의, particle, [의] or [에]. 의사, start, [의]. 회의, later syllable, [의] or [이]. 희망, after consonant, [히]. Spoken: [우리의 의사 선생니믄 회의에서 히망을 이야기해써요], with [우리에] and [회이에서] also allowed.

Exercise 3: false. ㄸ is a consonant, so ㅢ must be [이]: [띠어쓰기].

If you missed any answer in the "after consonant" position, repeat the table in that section aloud with the audio before moving on.

Where to Go Next

Continue with Korean Vowel Length, which explains the long and short vowels the standard still lists. If the glide itself felt difficult, review Korean W Vowels ㅘ ㅝ ㅟ for practice with other glides. All vowel lessons sit in Korean Vowel Sounds.

This lesson does not teach the grammar of the particle 의, contractions such as 나의 → 내, or the full list of sound change rules that move consonants between syllables. It also does not cover regional pronunciations of ㅢ. Those topics have their own pages.

In short, how to pronounce ui in Korean comes down to one check per letter: a consonant in front means [이], the first syllable means [의], a later syllable allows [의] or [이], and the particle allows [의] or [에].

Frequently Asked Questions

Is 의 pronounced ui or eui? Both spellings point to the same sound. Revised Romanization, the official system, writes ㅢ as ui, so 의사 is uisa. The spelling eui comes from older habits and is still common in personal names. Neither spelling is a pronunciation guide: say a quick ㅡ gliding into ㅣ in one syllable, [의], at the start of a word.

Why is 희 pronounced hi? Standard Pronunciation Rules Article 5 says that ㅢ in a syllable that starts with a consonant is pronounced [이]. ㅎ is a consonant, so 희 is said [히]. The rule covers every consonant, which is why 희망 (hope) is [히망], 무늬 (pattern) is [무니] and 띄어쓰기 (word spacing) is [띠어쓰기].

Is possessive 의 said as 에? Yes, it may be. The Standard Pronunciation Rules give [의] as the standard sound of the particle 의 and also allow [에]. 나의 (my) can be [나의] or [나에], and 우리의 (our) can be [우리의] or [우리에]. In everyday speech, [에] is very common; in a speech or a reading, [의] is also natural.

How does 무늬 sound? 무늬 (pattern) is pronounced [무니]. The second syllable starts with the consonant ㄴ, and ㅢ after a consonant is always said [이]. The spelling keeps ㅢ because the word has always been written that way, so the letters and the sound differ. Revised Romanization still writes munui.

Can I always say [의] to be safe? Not always. Saying [의] is correct at the start of a word, in later syllables and for the particle, so it is safe in three of the four positions. After a consonant, however, [의] is wrong: 희망 must be [히망], not [희망]. Learn that one position first, and the safe default covers the rest.

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