午睡

1. Origins, structure, and basic meaning

• Structure: 午睡, read ごすい, combines midday 午 with sleep 睡 as a literary noun for a daytime nap.
• Basic usage: It is a formal term for taking a daytime nap, as in 短い午睡を取る.

2. Common pitfalls and similar expressions

• Tone and register
  • It is close in meaning to everyday 昼寝, but 午睡 is more literary and does not require the sleep to occur at exactly noon.