—v., -at•ed, -at•ing,
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.).
Bot.rough; covered with hard, projecting points, as a leaf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.