1. Try the Palm Test

Hold your palm approximately 10 to 15 centimetres in front of your mouth.

Now pronounce:

가 · 카 · 까

Pay attention to the amount of air that reaches your palm.

가: a plain sound

가 begins with the plain consonant ㄱ.

The sound is relatively gentle and relaxed.

카: an aspirated sound

카 begins with the aspirated consonant ㅋ.

When you pronounce it, you should feel a strong puff of air on your palm.

까: a tense sound

까 begins with the tense consonant ㄲ.

It is short, tight and firm. Although it may sound strong, it does not release as much air as 카.

Remember that 까 is not simply a louder version of 가. Do not shout. Tighten the sound and pronounce it briefly.

Try it again:

가 · 카 · 까

2. How the Shape of a Hangeul Letter Represents Sound

The original design of Hangeul follows systematic principles.

Some basic consonant letters were used as the foundation for related sounds. Additional strokes were then added to represent other consonants. This is known as the principle of 가획, or adding strokes.

For example:

ㄱ → ㅋ

A stroke is added to ㄱ to form ㅋ, which represents an aspirated sound with a stronger release of air.

The pattern continues through other consonant families.

This design helps learners see that the sounds are related.

More aspiration is represented by an added-stroke form.

That is not an accidental visual similarity. It is part of the systematic design of Hangeul.

3. The Full Letter Families

To understand the original system more fully, we can look at the consonant families in stages.

This means that ㅂ and ㅍ also belong to the same systematic process.

The basic letter ㅁ develops into ㅂ, and further added strokes produce ㅍ.

Similarly:

ㄴ develops into ㄷ, and then ㅌ.
ㅅ develops into ㅈ, and then ㅊ.

The visual design of the letters reflects relationships between their sounds.

4. What Happens When ㄱ Meets ㅎ?

The relationship between ㄱ, ㅎ and ㅋ can also be observed in Korean pronunciation.

When a sound such as ㄱ meets ㅎ, the two sounds may combine and be pronounced as the aspirated sound ㅋ.

For example:

축하 → [추카]
Congratulations

국화 → [구콰]
Chrysanthemum

좋고 → [조코]
Good

This is called aspiration.

The consonants can combine in pronunciation as follows:

ㄱ + ㅎ → ㅋ
ㄷ + ㅎ → ㅌ
ㅂ + ㅎ → ㅍ
ㅈ + ㅎ → ㅊ

The exact pronunciation depends on the word and syllable position, but this pattern helps learners understand the relationship between these sounds.

It is useful to separate two related ideas:

They are not exactly the same rule, but together they demonstrate how systematically Korean sounds are organised.

5. Plain, Aspirated and Tense Consonants

Korean learners need to distinguish three consonant types.

The pronunciation order used here is:

plain → aspirated → tense

This order makes the airflow easier to understand.

Plain consonants

ㄱ · ㄷ · ㅂ · ㅅ · ㅈ

Practise:

가 · 다 · 바 · 사 · 자

These sounds are relatively gentle and relaxed.

Aspirated consonants

ㅋ · ㅌ · ㅍ · ㅊ

Practise:

카 · 타 · 파 · 차

These consonants release a strong puff of air. Your palm should clearly feel the airflow.

Tense consonants

ㄲ · ㄸ · ㅃ · ㅆ · ㅉ

Practise:

까 · 따 · 빠 · 싸 · 짜

These sounds are short, tight and firm, with relatively little airflow.

Korean does not have an aspirated partner corresponding to ㅅ, so we compare only:

사 · 싸

6. Practise Each Group

Hold your palm in front of your mouth and repeat each group slowly.

ㄱ family

가 · 카 · 까

Feel the strongest air on 카.

ㄷ family

다 · 타 · 따

Feel the strongest air on 타.

ㅂ family

바 · 파 · 빠

Feel the strongest air on 파.

ㅅ family

사 · 싸

There is no aspirated consonant between them.

ㅈ family

자 · 차 · 짜

Feel the strongest air on 차.

7. Practise with Korean Words

The difference between these consonants can change the meaning of a word.

달 · 탈 · 딸

달 — moon or month
탈 — mask
딸 — daughter

불 · 풀 · 뿔

불 — fire
풀 — grass
뿔 — horn

살 · 쌀

살 — flesh
쌀 — uncooked rice

자다 · 차다 · 짜다

자다 — to sleep
차다 — to be cold
짜다 — to be salty

Do not worry if the differences are difficult to hear at first. Your listening will improve as you repeatedly compare the sounds.

Harry’s Pronunciation Tip

Do not practise only with your ears.

Use three things together:

1. Look at the shape of the letter.
2. Listen to the sound.
3. Feel the airflow with your palm.

For example:

ㄱ → ㅋ → ㄲ

가 → 카 → 까

See the added stroke, feel the air from 카, and then compare it with the short, tight sound of 까.

This combination makes the pronunciation much easier to remember.

The Beauty of Hangeul

Hangeul is not simply a collection of unrelated symbols.

Its letters were organised into sound families. Their shapes help show how the sounds are connected, and the principle of adding strokes represents related consonants.

That is why the following pattern is so memorable:

ㄱ → ㅋ

ㄷ → ㅌ

ㅂ → ㅍ

ㅈ → ㅊ

The next time you pronounce 가, 카 and 까, do not only listen.

Look at the letters, hold your palm in front of your mouth and feel how the sound changes.

That is the beauty of Hangeul.