deepen

verbs

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, deepen, heighten, intensify
become more intense
"The debate intensified"; "His dislike for raw fish only deepened in Japan"
deepen, intensify
make deeper
"They deepened the lake so that bigger pleasure boats could use it"
deepen
is derived from
deepening
is a type of (narrower)
make larger
"She enlarged the flower beds"
enlarge
become deeper in tone
"His voice began to change when he was 12 years old"; "Her voice deepened when she whispered the password"
change, deepen