toughen

加强、强化、使更严格

The government plans to toughen the laws on drunk driving.

政府打算加强酒驾相关的法规。

使坚韧、变硬、使更耐用

The glass is heated and cooled to toughen it.

这种玻璃经过加热与冷却处理以增加韧性。

使坚强、磨练、变得坚强

Years of hard work toughened him considerably.

多年的辛劳让他变得坚强许多。

坚强起来、变得更坚强口语

You need to toughen up if you want to survive in this industry.

你想在这行生存下去，就得坚强一点。