noun, noun or participle which takes 'suru', intransitive verb
going to bed early; early bedtime
Common in everyday speech and writing; often used in the set phrase 早寝早起き (early to bed and early to rise).
明日は早いから、今夜は早寝しよう。
I have an early start tomorrow, so I'll go to bed early tonight.
健康のために早寝早起きを心
I try to keep early hours for my health.