palpitation

Noun

Meaning

A rapid pulsation; a throbbing; esp., an abnormal, rapid beating of the heart as when excited by violent exertion, strong emotion, or by disease.

Source: Webster's dictionary

vibration shaking trembling quiver quivering shakiness oscillation endocarditis pulsation shudder wave beat pulse resonance beating

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fortitude heart faith confidence steady determination

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motion symptom

tremor tremolo

the shaking of his fingers as he lit his pipe Source: Internet