stiffening

例句：

1. He stiffened (with terror) at the horrific sight.
   他看到那恐怖的情景嚇呆了。
2. My back has stiffened (up) overnight.
   我的後背一夜之間強直了。
3. The promise of a reward might stiffen their resolve.
   答應給他們獎勵可以堅定他們的決心。
4. He stiffened at the insult.
   他聽到這些侮辱的話，態度強硬起來。

英文解釋：

名詞 stiffening:

1. the act of becoming stiff
2. the process of becoming stiff or rigid
   同義詞：rigidifying, rigidification

動詞 stiffen:

1. become stiff or stiffer
   同義詞：stiffen
2. make stiff or stiffer
   同義詞：stiffen
3. restrict
   同義詞：stiffen, tighten, tighten up, constrain