deepen

(v) 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
- This event only deepened my convictions
compound, intensify, heighten,
(v) become more intense
- The debate intensified
- His dislike for raw fish only deepened in Japan
intensify,
(v) make deeper
- They deepened the lake so that bigger pleasure boats could use it
(v) become deeper in tone
- His voice began to change when he was 12 years old
- Her voice deepened when she whispered the password
change,

compound intensify heighten change

deeply

deepening