kuちるchiru
1.

To undergo a gradual decline in structure or quality due to factors such as moisture or pest damage, leading to a loss of function or integrity, often used in reference to wood or organic matter.

2.

To experience a deterioration of reputation or status over time, suggesting that one's prominence or recognition may fade into obscurity.

3.

To come to an end in a futile or unfulfilled manner; to perish or cease to exist without achieving significant impact, often implying a sense of loss or regret.

Example:

朽ちない物は何もない。