heighten

become more extreme; "The tension heightened"

make more extreme; raise in quantity, degree, or intensity; "heightened interest"

increase; "This will enhance your enjoyment"; "heighten the tension"

increase the height of; "The athletes kept jumping over the steadily heightened bars"

make (one's senses) more acute; "This drug will sharpen your vision"

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"