to (cause to) become less strong, powerful, determined, or effective

You could see the poor dog weakening daily as the disease spread through its body. 随着这种疾病在这条可怜的狗身上扩散，你能看到它在一天天衰弱下去。

The bill would seriously weaken environmental protections. 这项法案将严重削弱对环境的保护。

We know that prolonged exposure to vibration can weaken aircraft components. 我们知道，长时间处在震动状态下会降低飞机零件的强度。

She's weakening - ask her some more questions and see if she confesses. 她快挺不住了——再问她些问题看她会不会坦白。