noun, noun or participle which takes 'suru', intransitive verb
deterioration; becoming decrepit; becoming worn out
Refers to the process of aging and wearing out, especially of buildings, infrastructure, or equipment. Often used in formal or technical contexts.
この橋は老朽化が進んでいる。
This bridge is deteriorating.
老朽化した建物
It was decided to demolish the decrepit building.