intensify
verb
increase in extent or intensity
“The Allies escalated the bombing”
make more intense, stronger, or more marked
“The efforts were intensified”
“Her rudeness intensified his dislike for her”
become more intense
“The debate intensified”
“His dislike for raw fish only deepened in Japan”
Synonymsdeepenmake the chemically affected part of (a negative) denser or more opaque in order produce a stronger contrast between light and dark
Source: WordNet 3.1, Princeton University
