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shudder
This word captures a visceral, involuntary physical reaction. It is more violent and sudden than a simple shiver, often implying a deep emotional or psychological trigger such as horror, revulsion, or intense dread. When used as a verb, it frequently describes a reaction to a mental image or a hypothetical scenario, as in the common phrase "shudder to think." In a mechanical sense, the word describes a jarring, unstable vibration. This usage shifts the focus from biological emotion to structural instability, suggesting a failure of smooth operation or a sudden impact that resonates through a physical object.
Meanings
To tremble convulsively, typically as a result of fear, cold, or disgust.
"He shuddered at the memory of the accident."
To feel a sudden feeling of fear or disgust when thinking about or seeing something.
"I shudder to think what would have happened if we had arrived a minute later."