The term PRINTER INSERT is composed of three parts: TRAY (4 letters), CARTRIDGE (9 letters), and TONER (5 letters). A printer insert TRAY is a device used to hold paper in a printer. It is usually located at the bottom of the printer and can be opened to insert paper. A printer CARTRIDGE is a device that contains the ink or TONER used to print documents. It is inserted into the printer and replaced when it runs out of ink or TONER. Finally, TONER is a powdery substance used in laser printers to create images on paper. It is usually contained in a CARTRIDGE and is replaced when it runs out.