wornout

He finally threw away his wornout hiking boots after they developed large holes.

(Chinese) 在他的徒步靴磨出了大洞后，他终于把它们扔掉了。

The engine failed because of a wornout fan belt that had snapped.

(Chinese) 发动机故障是因为一根磨损的扇形皮带断裂了。

The marathon runner felt completely wornout after crossing the finish line.

(Chinese) 马拉松选手在冲过终点线后感到筋疲力尽。

After a week of overtime, the entire staff looked wornout and stressed.

(Chinese) 经过一周的加班，全体员工看起来都疲惫不堪且压力巨大。