<OL TYPE="1"><LI>to make sharp, sharpen<OL TYPE="a"><LI>to stimulate, spur on, urge<LI>to irritate, provoke, arouse to anger<OL TYPE="1"><LI>to scorn, despise<LI>provoke, make angry<LI>to exasperate, to burn with anger</OL></OL></OL>