Noun, Suru verb, Intransitive verbgoing to bed; retiring (for the night)

Noun, Suru verb, Intransitive verb(afternoon) nap; sleeping during the day; siesta

Noun, Suru verb, Intransitive verbgo to bed early

Noun, Suru verb, Intransitive verbgoing back to sleep; sleeping in

V2n S, Intransitive verbto lie down; to go to bed; to go to sleep