劣化

1. Origins, structure, and basic meaning

• Structure: 劣化 is read as れっか and is a noun and する verb for deterioration or degradation in a material, photograph, product, or similar item.
• Basic usage: A material changing appears in 素材が劣化する, while preservation appears in 劣化を防ぐ.

2. Common pitfalls and similar expressions

• Progress and prevention
  • Use が劣化する for the item that deteriorates and 劣化を防ぐ for preventing that process.
• Difference from 悪化
  • 悪化 broadly covers a worsening situation or symptom; 劣化 mainly concerns declining quality, performance, or condition in materials and products.