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Kotomora

睡

drowsy, sleep, die

JLPTN1StatusJōyō · secondary schoolFrequencyTop 2,000Strokes13

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

Explore all words using 睡 →

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.