The term 'lose freshness' can be described by the crossword solutions of WILT, AGE, FADE, TURN, DROOP, WITHER, and go stale. WILT is a process in which plants lose their rigidity and DROOP due to lack of water or nutrients. AGE is the process of becoming older, which can cause food to lose its freshness. FADE is the process of becoming less intense or visible over time, which can happen to the color and flavor of food. TURN is the process of changing from one state to another, such as when food goes bad. DROOP is similar to WILT, but it is used to describe the sagging of an object due to gravity. WITHER is the process of becoming dry and shriveled, which can happen to food over time. Go stale is the process of becoming hard and losing flavor, which can happen to food that has been left out for too long.