Deepen Common

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"

become more intense

"The debate intensified"

"His dislike for raw fish only deepened in Japan"

make deeper

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

become deeper in tone

"His voice began to change when he was 12 years old"

"Her voice deepened when she whispered the password"

To make deep or deeper

"The heavy rain continued to deepen the mud on the hiking trail, making it impossible for us to proceed without getting our boots stuck."