To render more intense; as, to intensify heat or cold; to intensify colors; to intensify a photographic negative; to intensify animosity.

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"

become more intense; "The debate intensified"; "His dislike for raw fish only deepened in Japan"

make the chemically affected part of (a negative) denser or more opaque in order produce a stronger contrast between light and dark

To become intense, or more intense; to act with increasing power or energy.

To increase or concentrate, such as to increase the voltage of an electrical current.

increase in extent or intensity; "The Allies escalated the bombing"