就寝

1. Origins, structure, and basic meaning

• Structure: 就寝 is read as しゅうしん and is a formal noun for going to bed; it also combines with する as a verb.
• Basic usage: Going to bed at ten appears in 十時に就寝する, while reading a novel before bedtime appears in 就寝前に小説を読む.

2. Common pitfalls and similar expressions

• Register relative to 寝る
  • 就寝する is a formal expression suited to schedules and notices, whereas 寝る is the everyday verb.