
Shudder
Unpleasant Trigger
Use 'shudder' when describing a physical reaction to something upsetting or disturbing.

I shuddered every time I heard his name.
Involuntary Movement
'Shudder' implies a small, uncontrollable movement, unlike voluntary shivering to get warm.

She shuddered as if touched by a chill.
Brief Sensation
A 'shudder' typically describes a quick, momentary action, not a prolonged state.

A shudder passed through the crowd at the announcement.
Compare with
ConvulseJerkQuakeQuiverShiverTrembleTwitchVibrate
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