harden

1、(使)坚硬，硬化。

This additive hardens the cement in an hour

这种添加剂会使水泥在一小时之后变硬。

The bread will harden if you don't cover it.

这种面包如果不盖起来就会变硬。

2、使变得冷酷无情，变得冷漠，麻木不仁的

Years of reporting on wars hardened them to human suffering。

多年来对战争的报到使得他们对人类的痛苦变得麻木不仁了。

His eyes hardened when he saw her.

看到她时，他的眼光变得很冷漠。

harden your heart 硬起心肠，不心软

3、(使)坚定

Obama appeared to have hardened his line on Europe.

看来奥巴马更坚定了他在欧洲问题上的态度。