WordWeb Online

1. Extremely annoying or displeasing
   "his cavelier curtness of manner was exasperating"; "I've had an exasperating day"
   - infuriating, maddening, vexing
    
2. Making worse
   - aggravating, exacerbating

1. Exasperate or irritate
   - exacerbate, aggravate
    
2. Make furious
   - infuriate, incense
    
3. Make worse
   - worsen, aggravate, exacerbate

See also: displeasing, exasperatingly, exasperation, intensifying

Type of: alter, anger, change, modify