The term 'CARVE A DESIGN INTO GLASS' can be summarized as the process of etching, which is a four-letter word. Etching is a technique used to create designs on glass by using an acidic material to cut into the surface of the glass. This technique has been used for centuries to create decorative and functional pieces of art. The process involves using a sharp tool to draw a design onto the glass, then applying an acid or other corrosive material to the glass to create the desired effect. The result is a unique and beautiful piece of art that can be used for a variety of purposes.