godan verb (-ru), intransitive verb
become completely chilled; get thoroughly cold
Describes something becoming cold all the way through, often with a nuance of being unpleasantly or thoroughly chilled. Can refer to body parts, rooms, or relationships.
手足が冷え切って感覚がない。
My hands and feet are completely chilled and numb.
暖房が壊れて部屋が冷え切っ
The heater broke and the room got thoroughly cold.