The word "precurse" means to foreshadow or be an indication of something to come. Some synonyms for this word include "herald," "presage," "augur," "portend," and "prognosticate." Each of these words indicates the idea of something that is about to occur, perhaps warning of an impending event or simply indicating that something is on the horizon. These synonyms can be used interchangeably with "precurse" in sentences like "The dark clouds on the horizon were a precurse of the storm to come" or "His sudden departure served as a herald of the changes coming to the company".