trepidation

A state of alarm or dread; apprehension. synonym: fear.

An involuntary trembling or quivering.

Tremulous agitation; perturbation; alarm.

A trembling of the limbs, as in paralytic affections.

A vibratory motion; a vibration.

In ancient astronomy, a libration of the eighth sphere, or a motion which the Ptolemaic system ascribes to the firmament to account for certain phenomena, especially precession, really due to motions of the axis of the earth.

Synonyms Tremor, Emotion, etc. (see agitation), flutter, tremulousness, discomposure.

An involuntary trembling, sometimes an effect of paralysis, but usually caused by terror or fear; quaking; quivering.

Hence, a state of terror or alarm; fear; confusion; fright.

A libration of the starry sphere in the Ptolemaic system; a motion ascribed to the firmament, to account for certain small changes in the position of the ecliptic and of the stars.