Mortar Mate is a tool used in construction and masonry work. It is a combination of a MORTAR board and a pestle, which are both used to mix and spread MORTAR. The term 'MORTAR Mate' is derived from the two words 'MORTAR' and 'pestle, ' with the latter being a six-letter word. The pestle is used to grind and mix ingredients, while the MORTAR board is used to spread the mixture. Together, they form the MORTAR Mate, which is an essential tool for any masonry or construction project.