- to irritate or provoke to a high degree; annoy extremely: He was exasperated by the senseless delays.
- to increase the intensity or violence of (disease, pain, feelings, etc.).
- rough; covered with hard, projecting points, as a leaf.
- to cause great irritation or anger to; infuriate
- to cause (an unpleasant feeling, condition, etc) to worsen; aggravate
- having a rough prickly surface because of the presence of hard projecting points
