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V-ERG
（使）變硬;（使）硬化
When something hardens or when you harden it, it becomes stiff or firm.
例句
Mould the mixture into shape while hot, before it hardens...
在混合物還沒有變硬之前，趁熱將它塑成形。
Give the cardboard two or three coats of varnish to harden it.
在紙板上涂兩三層清漆使其變硬。
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V-ERG
（使）（態度、想法）變得更堅定;（使）變得更強硬
When an attitude or opinion hardens or is hardened, it becomes harsher, stronger, or fixed.
例句
Their action can only serve to harden the attitude of landowners...
他們的行動只會讓土地擁有者的態度變得更堅定。
The bitter split which has developed within Solidarity is likely to harden further into separation.
團結工會內部已產生的不愉快分歧可能會進一步演變為分裂。
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VERB
（價格、經濟）變得更穩定
When prices and economies harden, they become much more stable than they were.
例句
Property prices are just beginning to harden again.
房地產價格剛開始重新趨于穩定。
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V-ERG
（使）變得堅強;（使）變得冷酷無情;（使）變得麻木不仁
When events harden people or when people harden, they become less easily affected emotionally and less sympathetic and gentle than they were before.
例句
Her years of drunken bickering hardened my heart...
她多年來醉酒尋釁的惡習讓我變得麻木。
She was hardened by the rigours of the Siberian steppes...
西伯利亞大草原的艱苦環境使她變得堅強起來。
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VERB
（表情、眼神）變得嚴肅，變得不快
If you say that someone's face or eyes harden, you mean that they suddenly look serious or angry.
例句
His smile died and the look in his face hardened.
他的笑容消失了，臉上的表情嚴肅了起來。