This is the 2490th most frequent Japanese word.
冷え
"冷え" (hie) means "chill" or "coldness."
冷え is used here as a noun that refers to the state of being cold, specifically regarding the room's atmosphere.
冬になると、部屋の冷えが気になります。
In winter, I am concerned about the coldness of the room.
冷え is used as part of the verb 冷える, meaning 'to become cold', and it describes the result of over-drinking on the body's temperature.
飲みすぎると体が冷えますよ。
If you drink too much, your body might get cold.
冷え refers to the condition of being cold, specifically regarding the body or atmosphere, hence indicating the need for warm clothing.