deepen

动词 deepen:

1. make more intense, stronger, or more marked
   同义词：intensify, compound, heighten
2. become more intense
   同义词：intensify
3. make deeper
4. become deeper in tone
   同义词：change

1. The feeling deepened with the passing of the years.
   这种感觉一年一年地加深了。
2. His smile deepened, but he made no attempt to answer.
   他的微笑加深了，但他没有打算要回答。
3. The night deepened.
   夜深了。

deep.en

v.tr.intr.（及物动词和不及物动词）
deep.ened,deep.en.ing,deep.ens
To make or become deep or deeper.
使…加深，或变深