Become dry is a term used to describe the process of losing moisture. WITHER, which has 6 letters, is a verb meaning to become dry and shriveled, usually due to lack of water or exposure to heat. PARCH, which has 5 letters, is a verb meaning to make extremely dry, typically by exposure to heat. SEAR, which has 4 letters, is a verb meaning to make something very dry or withered, usually by exposure to intense heat.