intensify

(v) increase in extent or intensity
- The Allies escalated the bombing
escalate, step up,
(v) 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
- This event only deepened my convictions
compound, deepen, heighten,
(v) become more intense
- The debate intensified
- His dislike for raw fish only deepened in Japan
deepen,
(v) make the chemically affected part of (a negative) denser or more opaque in order produce a stronger contrast between light and dark

escalate step up compound deepen heighten

de-escalate step down weaken

intension intensity intensive

intensifying