Carving into metal is a process that involves several steps. Engraving, which is done with seven letters, is the process of cutting or carving a design into a hard surface, such as metal. Etching, which is done with four letters, is the process of using acid to cut into the surface of metal. Incising, which is done with six letters, is the process of cutting or carving a design into a hard surface, such as metal, with a sharp tool. Embossing, which is done with six letters, is the process of creating a raised design on a hard surface, such as metal, by pressing a stamp or die into it. Smelting, which is done with five letters, is the process of melting and refining ore to extract a metal from its ore.