verb, -at⋅ed, -at⋅ing, adjective | 1. | to irritate or provoke to a high degree; annoy extremely: He was exasperated by the senseless delays. |
| 2. | Archaic. to increase the intensity or violence of (disease, pain, feelings, etc.). |
| 3. | Botany. rough; covered with hard, projecting points, as a leaf. |