tremor tremor /ˈtrɛmɝ/

noun

1. () An involuntary vibration (as if from illness or fear)  ( shudder , tremor )
   an involuntary vibration (as if from illness or fear)
   
2. () A small earthquake  ( earth tremor , microseism , tremor )
   a small earthquake
    The tremor was a warning sign of the upcoming earthquake
   The tremor was a warning sign of the upcoming earthquake
   
3. Shaking or trembling (usually resulting from weakness or stress or disease)  ( tremor )
   shaking or trembling (usually resulting from weakness or stress or disease)
    The elderly man experienced a tremor in his hand due to his medical condition.
   The elderly man experienced a tremor in his hand due to his medical condition.
   
   

verb

1. Shake with seismic vibrations  ( quake , tremor )
   shake with seismic vibrations
    The earth was quaking
   The earth was quaking