trepidation

noun

tremulous fear, alarm, or agitation; perturbation.

trembling or quivering movement; tremor.

Origin:
1595–1605; < Latin trepidātiōn- (stem of trepidātiō), equivalent to trepidāt(us) (past participle of trepidāre to hurry, alarm; see trepid, -ate¹) + -iōn- -ion

Related forms

trep·i·da·tious, adjective

trep·i·da·tious·ly, adverb

Synonyms
1. trembling, fright. 2. quivering, shaking.

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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a person who pretends to have virtues, moral or religious beliefs or principles that he or she does not actually possess

the direct opposite or contrast to a previously given assertion

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Collins

World English Dictionary

trepidation (ˌtrɛpɪˈdeɪʃən)

—n
1.	a state of fear or anxiety
2.	a condition of quaking or palpitation, esp one caused by anxiety

[C17: from Latin trepidātiō, from trepidāre to be in a state of alarm; compare intrepid]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline

Word Origin & History

trepidation

1605, from L. trepidationem (nom. trepidatio) "agitation, alarm, trembling," noun of action from pp. stem of trepidare "to tremble, hurry," from trepidus "alarmed, scared," from PIE *trep- "to shake, tremble" (cf. Skt. trprah "hasty," O.C.S. trepetati "to tremble"), related to *trem- (see tremble).

Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage

Medical Dictionary

trepidation trep·i·da·tion (trěp'ĭ-dā'shən)
n.