The crossword solution for the term 'Purifies, as water' is 'BOILS'. Boiling is a process of heating a liquid until it reaches its boiling point, which is when the vapor pressure of the liquid is equal to the atmospheric pressure. Boiling is used to purify water by killing any bacteria or other microorganisms that may be present in the water. Boiling also removes any impurities that may be present in the water.