deepen

verb

1. 1

   become more intense

   The debate intensified

   His dislike for raw fish only deepened in Japan

2. 2

   make more intense, stronger, or more marked

   The efforts were intensified", "Her rudeness intensified his dislike for her

   Pot smokers claim it heightens their awareness

3. 3

   become deeper in tone

   His voice began to change when he was 12 years old

   Her voice deepened when she whispered the password

4. 4

   make deeper

   They deepened the lake so that bigger pleasure boats could use it