shivering  /ˈʃɪv.ər/

 = When people or animals shiver, they shake slightly because they feel cold, ill or frightened

my Feeling:

I was shivering on the street of Beijing on December. very cold!!

wiki for Shivering

Shivering is a bodily function in response to early hypothermia in warm-blooded animals. When the core body temperature drops, the shivering reflex is triggered to maintain homeostasis. Muscle groups around the vital organs begin to shake in small movements in an attempt to create warmth by expending energy. Shivering can also be a response to a fever, as a person may feel cold, though their core temperature is already elevated.