英汉词典

1. （使）变硬;（使）硬化
    When something hardens or when you harden it, it becomes stiff or firm.

harden的翻译

    e.g. Mould the mixture into shape while hot, before it hardens...
           在混合物还没有变硬之前，趁热将它塑成形。
    e.g. Give the cardboard two or three coats of varnish to harden it.
           在纸板上涂两三层清漆使其变硬。

2. （使）（态度、想法）变得更坚定;（使）变得更强硬
    When an attitude or opinion hardens or is hardened, it becomes harsher, stronger, or fixed.

harden的解释

    e.g. Their action can only serve to harden the attitude of landowners...
           他们的行动只会让土地拥有者的态度变得更坚定。
    e.g. The bitter split which has developed within Solidarity is likely to harden further into separation.
           团结工会内部已产生的不愉快分歧可能会进一步演变为分裂。