SHIVER

v. quiver, shake, shudder, tremble; shatter, break into pieces; be shattered, be broken into pieces

n. tremble, vibration, shudder; small fragment, splinter, sliver

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. 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.
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Shiver involuntary shaking of the body, as with cold. It is caused by contraction or twitching of the muscles, and is a physiological method of heat [more]Shiver - Community and Resources

Noun
1. reflex shaking caused by cold or fear or excitement
(synonym) tremble, shake
(hypernym) reflex, instinctive reflex, innate reflex, inborn reflex, unconditioned reflex, physiological reaction
(derivation) shudder
2. an almost pleasurable sensation of fright; "a frisson of surprise shot through him"
(synonym) frisson, chill, quiver, shudder, thrill, tingle
(hypernym) fear, fearfulness, fright
(derivation) shudder, throb, thrill
Verb
1. tremble convulsively, as from fear or excitement
(synonym) shudder, throb, thrill
(hypernym) tremble
(derivation) frisson, chill, quiver, shudder, thrill, tingle
2. shake, as from cold; "The children are shivering--turn on the heat!"
(synonym) shudder
(hypernym) move involuntarily, move reflexively
(derivation) tremble, shake

(v. t.)
To cause to shake or tremble, as a sail, by steering close to the wind.
  

(v. t.)
To break into many small pieces, or splinters; to shatter; to dash to pieces by a blow; as, to shiver a glass goblet.
  

(v. i.)
To tremble; to vibrate; to quiver; to shake, as from cold or fear.
  

(v. i.)
To separate suddenly into many small pieces or parts; to be shattered.
  

(n.)
The act of shivering or trembling.
  

(n.)
One of the small pieces, or splinters, into which a brittle thing is broken by sudden violence; -- generally used in the plural.
  

(n.)
A variety of blue slate.
  

(n.)
A thin slice; a shive.
  

(n.)
A spindle.
  

(n.)
A small wedge, as for fastening the bolt of a window shutter.
  

(n.)
A sheave or small wheel in a pulley.