deepen (v)

Definition: make deeper
Example: They deepened the lake so that bigger pleasure boats could use it.

deepen (v)
change (v)

Definition: become deeper in tone
Example: His voice began to change when he was 12 years old. Her voice deepened when she whispered the password.

intensify (v)
deepen (v)

Definition: become more intense
Example: The debate intensified. His dislike for raw fish only deepened in Japan.

intensify (v)
heighten (v)
deepen (v)
compound (v)

Definition: make more intense, stronger, or more marked
Example: The efforts were intensified. Her rudeness intensified his dislike for her. Pot smokers claim it heightens their awareness. This event only deepened my convictions.