(すいみん)

すいみん
noun
sleep
1. sleep
The natural periodic state of rest in which the body recovers.
It's important to get enough sleep.
My head is fuzzy from lack of sleep.
I want to improve my sleep quality.
The number of people suffering from sleep disorders is increasing, and more hospitals are setting up specialized clinics.

睡眠(すいみん) is the formal/medical term for sleep.

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