aggravation
     n 1: an exasperated feeling of annoyance [syn: {exasperation}]
     2: unfriendly behavior that causes anger or resentment [syn: {irritation},
         {provocation}]
     3: action that makes a problem or a disease (or its symptoms)
        worse; "the aggravation of her condition resulted from
        lack of care" [syn: {exacerbation}]
Source: WordNet® 2.0