病気

1. Origins, structure, and basic meaning

• Structure: In 病気 (びょうき), illness 病 and condition 気 combine to denote sickness or disease.
• Basic usage: 病気 is a noun denoting illness or disease.

2. Common pitfalls and similar expressions

• Illness as a noun
  • 病気が makes the illness the subject that occurs or has an effect; it does not function exactly like the English adjective sick applied directly to a person.