ETYM Latin, from tremere to tremble. Related to Tremble.
Minor earthquake.
Involuntary quivering or shaking of a part of the body. It may be due to fatigue, anxiety, advanced age, debility or a range of neurological conditions, especially Parkinson's disease.
1. A small earthquake; SYN. earth tremor, microseism.
2. An involuntary vibration (as if from illness or fear); SYN. shudder.

To shake with seismic vibrations, as of planets; SYN. quake.