How to pronounce “ku” in Chinese
ku = k + u,[kʰu].Used in 3 tones and 4 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.
Hold one steady high note, like a doctor’s “aaah”. English has no flat pitch, so it will feel unnaturally robotic — that is correct.
— model— your pitch· Shape, not score. Scoring lives in the app.
痛苦tòng kǔ — pain
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.
— model— your pitch· Shape, not score. Scoring lives in the app.
裤子kù zi — trousers
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: -u
[u]
- What the mouth does
- Lips tightly rounded and pushed forward, tongue high and back.
- Closest English sound
- The oo in “food”, with more lip tension.
- Where learners slip
- Relaxing the lips into the u of “put”.
- Drill that fixes it
- Round the lips so hard you could hold a pencil in them, then say it.
“ku” in real words
Every word below comes from the HSK 1–3 vocabulary, so you can practise on words you will actually meet.
| Word | Pinyin | Meaning | HSK |
|---|---|---|---|
| kū | to cry; to weep | 2 | |
| tòng kǔ | pain | 3 | |
| kù zi | trousers | 3 | |
| duǎn kù | short pants | 3 |
Tone change you need to know
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.
Questions people ask about this syllable
How do you pronounce “ku” in Chinese?
“ku” is the initial k plus the final u, pronounced [kʰu]. Same closure as g, released with a strong puff. Lips tightly rounded and pushed forward, tongue high and back. It occurs in 3 tones, and the tone changes the word completely.
Which mistake do English speakers make on “ku”?
Under-aspirating, so kāi sounds like gāi. Relaxing the lips into the u of “put”. Fix it like this: Paper strip again — on k it must fly.
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.