deepen
英 ['diːp(ə)n]
美['dipən]
	    - vt. 使加深;使强烈;使低沉
 - vi. 变深;变低沉
 
英英释意
- 1. make more intense, stronger, or more marked;
 - "The efforts were intensified", "Her rudeness intensified his dislike for her"
 - "Potsmokers claim it heightens their awareness"
 - "This event only deepened my convictions"
 
- 2. become more intense;
 - "The debate intensified"
 - "His dislike for raw fish only deepened in Japan"
 
- 3. make deeper;
 - "They deepened the lake so that bigger pleasure boats could use it"
 
- 4. become deeper in tone;
 - "His voice began to change when he was 12 years old"
 - "Her voice deepened when she whispered the password"