transitive verb.
To cause to quake.
noun.
A tremulous agitation; a quick vibratory movement; a shudder; a quivering.
intransitive verb.
To be agitated with quick, short motions continually repeated; to shake with fear, cold, etc.; to shudder; to tremble.
intransitive verb.
To shake, vibrate, or quiver, either from not being solid, as soft, wet land, or from violent convulsion of any kind