harden/ˋhɑrdṇ; ˈhɑːdn/v [I,T] 1 to become firm or stiff, or to make something firm or stiff(使)变硬﹔(使)坚固﹔(使)硬化: It will take about 24 hours for the glue to harden. 胶水干透需要大约 24 小时。 2 if your attitude hardens, or if something hardens it, you become more strict and determined and less sympathetic(使)变得更坚定﹔(使)变得更强硬: Attitudes towards the terrorists have hardened even more since the attack. 那次袭击后﹐人们对恐怖分子的态度变得更强硬了。 —hardened adj [only before noun 仅用于名词前]a hardened criminal 惯犯