intensify

verb

1. 1

   become more intense

   The debate intensified

   His dislike for raw fish only deepened in Japan

2. 2

   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

3. 3

   increase in extent or intensity

   The Allies escalated the bombing

4. 4

   make the chemically affected part of (a negative) denser or more opaque in order produce a stronger contrast between light and dark