shudder

A shudder is an involuntary vibration, usually in your body, or the shaking itself. A cold breeze or an unpleasant memory might make you shudder.

A shudder isn't always a bad thing. It can mean a pleasurable sensation or tingle that goes through your body, like a shudder of excitement you feel when you see your favorite star on the street. As a verb, shudder means to shake and shiver. Being really cold or seeing something that scares you — a ghost! — can make you shudder. The phrase "shudder to think" means just the thought of something upsets you enough to shudder.

Definitions of shudder
1

v tremble convulsively, as from fear or excitement

Synonyms:
shiver, thrill, throb
Type of:
tremble
move or jerk quickly and involuntarily up and down or sideways

v shake, as from cold

Synonyms:
shiver
Type of:
move involuntarily, move reflexively
move in an uncontrolled manner

n an almost pleasurable sensation of fright

Synonyms:
chill, frisson, quiver, shiver, thrill, tingle
Type of:
fear, fearfulness, fright
an emotion experienced in anticipation of some specific pain or danger (usually accompanied by a desire to flee or fight)

n an involuntary vibration (as if from illness or fear)

Synonyms:
tremor
Type of:
quiver, quivering, vibration
the act of vibrating

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