Coolant is a liquid or gas used to reduce the temperature of a system. The term coolant can be broken down into three crossword solutions: ICE (3 letters), RADIATOR (8 letters), and SWEAT (5 letters). ICE is a solid form of water that is used to cool things down, such as drinks or food. RADIATOR is a device that is used to transfer heat from one medium to another, usually from a hot surface to a cooler surface. SWEAT is a liquid produced by the body to cool itself down when it gets too hot. All three of these terms are related to the concept of coolant, which is used to reduce the temperature of a system.