Pinyin syllable

How to pronounce “kou” in Chinese

kou = k + ou,[kʰoʊ].Used in 3 tones and 6 words from HSK 1–3.

Hear it, then say it

Tap play for each tone, then record yourself — your pitch curve is drawn on top of the model.

抠kōu

This tone exists, but no HSK 1–3 word uses it yet — practise the sound on its own.

Hold one steady high note, like a doctor’s “aaah”. English has no flat pitch, so it will feel unnaturally robotic — that is correct.

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口kǒu — mouth

门口mén kǒu — doorway

In real speech this tone is mostly LOW, not a full dip-and-rise. Drop to the bottom of your range and stay there; the rise only appears when the syllable is said alone or at the end of a phrase.

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扣kòu

This tone exists, but no HSK 1–3 word uses it yet — practise the sound on its own.

Start at the top and drop fast, like a firm “No!”. Short and decisive.

— model— your pitch· Shape, not score. Scoring lives in the app.

The initial: k

[kʰ]

What the mouth does: Same closure as g, released with a strong puff.
Closest English sound: The k in “kite”, with more air.
Where learners slip: Under-aspirating, so kāi sounds like gāi.
Drill that fixes it: Paper strip again — on k it must fly.

The final: -ou

[oʊ]

What the mouth does: Starts on a rounded o and tightens into u.
Closest English sound: The o in “go”.
Where learners slip: Mixing it up with ao — the two glide in different directions.
Drill that fixes it: ao opens then rounds; ou is rounded the whole way. Say them back to back.

“kou” in real words

Every word below comes from the HSK 1–3 vocabulary, so you can practise on words you will actually meet.

Pinyin	Meaning	HSK
kǒu	mouth	1
mén kǒu	doorway	1
lù kǒu	crossing	1
chū kǒu	an exit	2
rén kǒu	population	2
rù kǒu	entrance	2

Tone change you need to know

Two third tones in a row

When a third tone is followed by another third tone, the first one is pronounced as a second tone. 你好 is written nǐ hǎo but said “ní hǎo”. The writing never changes — only the mouth does.

Third tone before any other tone. Before a first, second or fourth tone, the third tone loses its rise entirely and stays low. This “half third” is what you hear in almost all real sentences.

Syllables you might confuse with this one

One sound apart from this syllable — the pairs that make natives mishear you.

kou → goudifferent initial: g狗 gǒu — dog kou → houdifferent initial: h时候 shí hou — time kou → kaodifferent final: ao考 kǎo — to check kou → kudifferent final: u哭 kū — to cry; to weep

Questions people ask about this syllable

How do you pronounce “kou” in Chinese?

“kou” is the initial k plus the final ou, pronounced [kʰoʊ]. Same closure as g, released with a strong puff. Starts on a rounded o and tightens into u. It occurs in 3 tones, and the tone changes the word completely.

Which mistake do English speakers make on “kou”?

Under-aspirating, so kāi sounds like gāi. Mixing it up with ao — the two glide in different directions. Fix it like this: Paper strip again — on k it must fly.

Hearing it right is half the job

The other half is producing it so a native hears the right tone. The free 2-minute check tells you which syllables are actually your weak ones.

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