睡 is a Chinese character with 13 strokes, radical 目 (eye), HSK 1 on the new exam.
Etymology
Oracle-bone origin
睡 does not appear in oracle-bone script. It is a phono-semantic compound built from 目 (eye) on the left as the semantic element and 垂 (to droop, hang down) on the right as the phonetic, though 垂 also contributes meaning: eyes that droop. The form is first attested clearly in seal script as an already-formed compound.
Form evolution
In small seal script the left side shows a vertical eye shape (目 turned on its side in earlier forms, upright by the seal period) and the right side shows 垂 with its characteristic drooping branches. Clerical script squared off both components, fixing 目 as a neat rectangle with horizontal strokes and regularising 垂 into the modern stroke pattern. Standard script (楷书) preserves this structure essentially unchanged.
How the meaning evolved
The original sense was specifically to doze off while sitting, with the eyes drooping shut, distinct from 寐 (to sleep in bed) and 寝 (to lie down to sleep). By the Han period 睡 had broadened to cover sleep more generally, and in modern Mandarin 睡 is the default verb for sleeping in any posture. The older distinction survives only in classical texts and fixed expressions.
Cultural note
The classical precision is preserved in the idiom 废寝忘食 (fèiqǐn-wàngshí, 'skip sleep and forget to eat'), which uses 寝 rather than 睡 because the reference is to proper lying-down rest. The compound 睡觉 (shuìjiào) literally combines 'doze' with 'wake up', an old pairing that now simply means 'to sleep'.
Mnemonic
Eyes drooping down — to sleep
Decomposition
Breaking a character into its components makes it far easier to recall. Each component above links to its own detail page.
Basic info
| Stroke count | 13 strokes |
| Radical | 目 (#109: eye) |
| New HSK exam | Recognise at HSK 1 |
| Frequency | #1444 most common |
Example sentences
我十点睡觉。
Wǒ shí diǎn shuìjiào.
I go to sleep at ten.
From 睡觉 (HSK 1)
Words containing 睡
| Word | Pinyin | Meaning | HSK |
|---|---|---|---|
| 睡觉 | shuìjiào | to sleep | HSK 1 |
Related characters
Similar meaning (action)
On the new HSK 1 exam
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Frequently Asked Questions
Reviewed by RJ Murray, Founder, HSK Lord.