noun, noun or participle which takes 'suru'
change over time; aging; secular change
Refers to gradual change in properties or appearance due to the passage of years, often used for materials, products, or natural phenomena. Can be used as a noun or with する to describe the process.
この素材は経年変化で色が濃くなる。
This material darkens in color over the years.
建物の
We investigate the aging of the building.