老化

1. Origins, structure, and basic meaning

• Structure: 老化, read ろうか, means aging or deterioration that develops over time in a body or material.
• Basic usage: It applies both to age-related bodily change and to sunlight-induced degradation of a material.

2. Common pitfalls and similar expressions

• Aging in bodies and materials
  • It applies both to bodily changes with age and to material deterioration caused by sunlight. The word is not limited to living people.