Verb
1. increase in extent or intensity;
"The Allies escalated the bombing"2. make more intense, stronger, or more marked;
"The efforts were intensified", "Her rudeness intensified his dislike for her""Potsmokers claim it heightens their awareness""This event only deepened my convictions"3. become more intense;
"The debate intensified""His dislike for raw fish only deepened in Japan"4. make the chemically affected part of (a negative) denser or more opaque in order produce a stronger contrast between light and dark