shudder

To shiver convulsively, as from fear or revulsion. synonym: shake.

To vibrate; quiver.

A convulsive shiver, as from fear or revulsion.

A vibration or trembling motion.

To shake; quiver; vibrate.

Hence, in particular, to tremble with a sudden convulsive movement, as from horror, fright, aversion, cold, etc.; shiver; quake.

To have a tremulous or quivering appearance, as if from horror.

Synonyms Quake, etc. See shiver.

A tremulous motion; a quiver; a vibration.

Specifically, a quick involuntary tremor or quiver of the body, as from fear, disgust, horror, or cold; a convulsive shiver.