Open English Wordnet
Verbs
(v)intensify, compound, heighten, deepenmake 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” (v)intensify, deepenbecome more intense“The debate intensified”,
“His dislike for raw fish only deepened in Japan” (v)intensifymake the chemically affected part of (a negative) denser or more opaque in order produce a stronger contrast between light and dark