Lesson 101: syllable blocks and the 21 vowels

Hangul is not an alphabet you read left to right. It is an alphabet you read left to right inside a box, and the boxes go left to right. Getting that straight first makes the rest of the writing system fall out almost for free.

The three slots#

Every syllable is a block with three positions. The third is optional.

So a syllable is C+V or C+V+C, never anything else. Never a bare vowel, never two vowels in a row, never a consonant on its own.

That “never a bare vowel” is the rule that surprises people, and it is why ㅇ exists. In the initial slot ㅇ is silent — a placeholder that fills the consonant position when the syllable genuinely starts with a vowel sound. 어 is not “a vowel on its own”; it is ㅇ + ㅓ, a block obeying the rule.

Counting the blocks#

Syllables are visible. You can count them without knowing a single word — each box is one:

Two of those blocks have a third slot and three do not, and you can see which from across the room. That is the whole reading system in one picture.

Where the vowel goes#

The block’s shape is decided by the vowel, not by the consonants. There are three layouts, each with a no-final and a with-final variant — six shapes in total, and every Korean word ever written is made of these:

Which layout you get, and the vowels that produce it:

Those six are the table above, drawn: same six shapes, real letters in the slots.

The pattern is not arbitrary. A vowel built on the vertical line ㅣ goes to the right; one built on the horizontal line ㅡ goes underneath; a compound of both takes both spaces. Which brings us to why the vowels look the way they do.

The vowels are built from three shapes#

The 15th-century design starts from three symbols, and every vowel is a combination of them:

Put the dot to the right of the human and you get ㅏ. Put it above the earth and you get ㅗ. Add a second dot for the y-glide: ㅏ → ㅑ, ㅗ → ㅛ. The dot flattened into a short stroke over the centuries, which is why they are all lines today.

Singular sounds (8)#

Dual sounds (13)#

Each is a glide onto a singular vowel — the deck gives the arithmetic:

ㅐ and ㅔ are distinct on paper and, for most modern speakers, identical in speech. So are ㅙ, ㅞ and ㅚ. You still have to spell them correctly — but do not spend practice time trying to hear a difference that has largely disappeared.

Their names#

A vowel’s name is just the vowel written as a syllable, with silent ㅇ in front:

Work culture: the formal greeting#

Pick a level before you open your mouth#

인사 [in-sa] means greeting, and Korean makes you choose how formal you are being before you can say hello at all.

At work, 안녕하세요 is almost always right, and 안녕하십니까 is the upgrade for a first introduction or a senior audience.

The bow#

Roughly 30 degrees, held briefly, eyes down rather than on the other person.

• Men — hands at the sides of the body.
• Women — hands together on the abdomen, right hand over the left.

Said while bowing:

안녕하세요. _______입니다.
[an-nyeong-ha-se-yo]  [im-ni-da]
Hello. I'm _______.

The handshake#

악수 [ak-ssu]. Use two hands with anyone senior to you — the second hand supports your own forearm or rests under the shaking hand. One hand alone to a senior reads as brusque.

처음 뵙겠습니다 literally means “I am seeing you for the first time”, so it is usable exactly once per person.

The whole sequence#

Strung together, a first introduction at work runs:

안녕하세요.                    Hello.
처음 뵙겠습니다.                Pleased to meet you.
(저는) 배춘제입니다.            I'm Chunjye Beh.
(저는) HMGICS 엔지니어입니다.   I'm an engineer at HMGICS.
잘 부탁드립니다.                I look forward to working with you.
[jal bu-tak-deu-rim-ni-da]

잘 부탁드립니다 has no clean English equivalent. Literally it is “please take care of me well” — an acknowledgement that you are about to depend on these people. Leaving it out makes an introduction feel unfinished to a Korean ear, so learn it as part of the greeting rather than as a separate phrase.

Practice links#

Pronunciation drills for the vowels, from the course reference list:

• 21 Korean vowels