Synset

make more intense, stronger, or more marked
<verb.change>   freq. cnt.: 9 freq. cnt.: 6 freq. cnt.: 2 freq. cnt.: 1

compound

deepen

heighten

intensify

sample sentences

"The efforts were intensified"
"Her rudeness intensified his dislike for her"
"Pot smokers claim it heightens their awareness"
"This event only deepened my convictions"