heighten
     v 1: become more extreme; "The tension heightened" [syn: {rise}]
     2: make more extreme; raise in quantity, degree, or intensity;
        "heightened interest"
     3: increase; "This will enhance your enjoyment"; "heighten the
        tension" [syn: {enhance}, {raise}]
     4: increase the height of; "The athletes kept jumping over the
        steadily heightened bars"
     5: make (one's senses) more acute; "This drug will sharpen your
        vision" [syn: {sharpen}]
     6: 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" [syn: {intensify},
         {compound}, {deepen}]
Source: WordNet® 2.0