睡
drowsy, sleep, die
Readings
On'yomi
- スイ
Kun'yomi
- ねむ.る
- ねむ.い
Meaning
睡 centers on the state of being drowsy or asleep. The meaning 'die' is a euphemistic extension, treating death as a final sleep.
Most common words using 睡
20 of 52- 睡眠すいみんN3
sleep
- 睡眠薬すいみんやく
sleeping pill; sleep medication
- 昏睡こんすいN1
coma
- 熟睡じゅくすい
deep sleep; sound sleep; profound sleep
- 爆睡ばくすい
sleeping like a log; (being) fast asleep (bombed, crashed)
- 睡魔すいま
sleepiness; drowsiness
- 睡蓮すいれん
water lily (any plant of genus Nymphaea)
- 一睡いっすい
wink of sleep; snooze; doze; nap
- 微睡むまどろむ
to doze (off)
- 午睡ごすい
nap; siesta
- 睡眠不足すいみんぶそくN3
lack of sleep; sleep deprivation
- 睡眠時間すいみんじかんN3
(one's) sleeping hours; hours of sleep
- アフリカ睡眠病アフリカすいみんびょう
African sleeping sickness; African trypanosomiasis
- ノンレム睡眠ノンレムすいみん
non-REM sleep
- フラッシュ睡眠フラッシュすいみん
microsleep
- レム睡眠レムすいみん
REM sleep
- 仮睡かすい
nap; doze
- 半睡はんすい
half asleep
- 半睡半醒はんすいはんせい
half asleep and half awake
- 半醒半睡はんせいはんすい
half awake and half asleep
Study
Etymology
睡 combines 目 (eye) with 垂, which likely contributes the sound and the idea of drooping or hanging down, suggesting eyelids drooping in sleep.
Meaning mnemonic
The eye 目 on the left and the drooping shape 垂 on the right picture an eyelid falling shut: drowsiness and sleep.
Reading mnemonic
For スイ, imagine a sleepy person swaying and almost falling: sway -> スイ, as their eyelids droop.