経年

経年

"経年" means "aging over time" or "elapsed years."

Here '経年' is used to describe aging over a period of time affecting the condition of an object.

この家具は経年劣化が見られます。

This piece of furniture shows signs of aging.

'経年' is employed here to denote the transformation or effects observed over time on the materials.

書籍の経年変化でページが黄色くなりました。

Due to aging, the pages of the book have turned yellow.

In this context, '経年' is used to indicate the impact of time on the structural integrity of the building.

経年により、建物の構造が弱くなってきました。

Over time, the structure of the building has become weaker.