Judder
Definition 1 of 2

Physical Response
The act of juddering can refer to the body's reaction to fear or anxiety.

He could feel his heart juddering with excitement.
Emotional Context
When someone experiences a shock, they may judder in response.

She felt her body judder with the unexpected news.
Formal Usage
In formal contexts, judder might describe mechanical issues in machinery.

The equipment juddered to a halt during the test.
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shaketremblevibratejoltquiver
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