1、(使)堅硬,硬化。
This additive hardens the cement in an hour
這種添加劑會使水泥在一小時之后變硬。
The bread will harden if you don't cover it.
這種面包如果不蓋起來就會變硬。
2、使變得冷酷無情,變得冷漠,麻木不仁的
Years of reporting on wars hardened them to human suffering。
多年來對戰(zhàn)爭的報到使得他們對人類的痛苦變得麻木不仁了。
His eyes hardened when he saw her.
看到她時,他的眼光變得很冷漠。
harden your heart 硬起心腸,不心軟
3、(使)堅定
Obama appeared to have hardened his line on Europe.
看來奧巴馬更堅定了他在歐洲問題上的態(tài)度。