tremble

1. to shake involuntarily with quick, short movements, as from fear, excitement, weakness, or cold; quake; quiver.

   Synonyms:

   shudder

2. to be troubled with fear or apprehension.

3. (of things) to be affected with vibratory motion.

   Synonyms:

   oscillate

4. to be tremulous, as light or sound.

   His voice trembled.

1. the act of trembling.

2. a state or fit of trembling.

3. (used with a singular verb) trembles,

   1. Pathology. milk sickness.

   2. Veterinary Pathology. a toxic condition of cattle and sheep caused by the eating of white snakeroot and characterized by muscular tremors.

1. to vibrate with short slight movements; quiver

2. to shake involuntarily, as with cold or fear; shiver

3. to experience fear or anxiety

1. the act or an instance of trembling