気分

1. Origins, structure, and basic meaning

• Structure: 気分 is read as きぶん and can mean either a person's mood or physical condition.
• Basic usage: It can describe feeling refreshed after a walk or feeling physically unwell.

2. Common pitfalls and similar expressions

• A refreshed feeling
  • 気分がすっきりする means feeling mentally refreshed or clear. Example: 朝の散歩をすると気分がすっきりする。
• Feeling physically unwell
  • 気分が悪くなる means becoming physically unwell in this context. Example: 彼は気分が悪くなり、静かな部屋で休んだ。