exasperate

exasperate (http://definr.com/exasperate)

     v 1: exasperate or irritate [syn: exacerbate, aggravate]
     2: make furious [syn: outrage, infuriate, incense]
     3: make worse; "This drug aggravates the pain" [syn: worsen,
        aggravate, exacerbate] [ant: better]