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How to Say ‘Lack of sleep’ in Japanese

寝不足

ne busoku

[neh FOO-soh-koo]

💬 Usage Tip: 不足 means "shortage" and attaches to nouns: 運動不足 (undō-busoku) "lack of exercise". Notice the sound shifts to (busoku).

Phrase Breakdown

寝

ne

[neh]

sleep

Stem of 寝る, 'to sleep; to lie down'.

Example

早く寝てください。

Please go to sleep early.

不足

busoku

[FOO-soh-koo]

lack; shortage

Not enough of something; with 寝 it means lack of sleep.

Example

運動不足です。

I don't get enough exercise.

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