不眠

1. Origins, structure, and basic meaning

• Structure: 不眠 is read as ふみん and is a noun for sleeplessness or difficulty obtaining sufficient sleep.
• Basic usage: Use 不眠に悩む for suffering from it and 生活習慣と不眠の関係 for a relationship with lifestyle.

2. Common pitfalls and similar expressions

• State and diagnosis
  • 不眠 can broadly name a sleepless condition; one sentence alone does not establish a specific medical diagnosis or cause.
• Contrast with 眠い
  • 眠い means feeling sleepy, while 不眠 focuses on being unable to sleep adequately.