vt.

1. 使变硬；使变坚固
   He hardened his hold on the door.

   他把门抓得更紧。

2. 使变得冷酷；使麻木
   Don't harden your heart against him.

   别对他硬心肠。

3. 使（身心）坚强起来，加强
   Life in the mountains hardened me.

   山里的生活使我坚强起来。

vi.

1. 变硬；变坚固
   Allow the clay to harden.

   让粘土变硬。

2. 变冷酷；变麻木
   Dennis is becoming hardened to failure.

   丹尼斯对失败变得麻木了。

3. 变坚强
   Opposition to the government hardened after the massacre.

   大屠杀使得对政府的反抗愈加激烈。

4. （价格，通货等）变坚挺；上涨

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.