This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A state of alarm or dread; apprehension. See Synonyms at fear.

n. An involuntary trembling or quivering.

n. A fearful state; a state of hesitation or concern.

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

n. 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.

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

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

n. 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.

n. Tremulous agitation; perturbation; alarm.

n. A trembling of the limbs, as in paralytic affections.

n. A vibratory motion; a vibration.

n. 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.

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

n. a feeling of alarm or dread

"Because this pervasive trepidation is unprecedented in their lifetime, most Americans have reflexively invoked the Depression in their efforts to comprehend their experience."

apprehension    apprehensiveness    dread   

trepidancy    trepidly    intrepid    trepidate    trepidatory    trepidatious    trepid    trepidity   

disturbance    agitation    tremor    fear    quaking    quivering    confusion    fright    hesitation    consternation   

Alsatian    Americanization    Appalachian    Balkanization    Christianization    Confederation    Corp.    Croatian    Dalmatian    Desegregation   

uneasiness    nervousness    unease    perplexity    consternation    revulsion    reluctance    puzzlement    bewilderment    awe