1. (

• intensify ,
• compound ,
• heighten ,
• deepen ,

) 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" ;

2. (

• intensify ,
• deepen

) become more intense; "The debate intensified"; "His dislike for raw fish only deepened in Japan" ;

3. (

• deepen ,

) make deeper; "They deepened the lake so that bigger pleasure boats could use it" ;

4. (

• deepen ,
• change ,

) become deeper in tone; "His voice began to change when he was 12 years old"; "Her voice deepened when she whispered the password" ;