vt.

1. 使變硬；使變堅固
   He hardened his hold on the door.

   他把門抓得更緊。

2. 使變得冷酷；使麻木
   Don't harden your heart against him.

   別對他硬心腸。

3. 使（身心）堅強起來，加強
   Life in the mountains hardened me.

   山裡的生活使我堅強起來。

vi.

1. 變硬；變堅固
   Allow the clay to harden.

   讓黏土變硬。

2. 變冷酷；變麻木
   Dennis is becoming hardened to failure.

   丹尼斯對失敗變得麻木了。

3. 變堅強
   Opposition to the government hardened after the massacre.

   大屠殺使得對政府的反抗愈加激烈。

4. （價格，通貨等）變堅挺；上漲

v.

1. make or become hard or harder.
   ▸(of prices of shares, commodities, etc.) rise and remain steady at a higher level.
2. (harden something off) inure a plant to cold by gradually increasing its exposure to the outside.