n.恐惧，害怕,
Merriam-Webster Online Dictionary
trepidation (noun)1.
archaic a motion - tremulous tremor
2.
a nervous or fearful feeling of uncertain agitation - apprehension trepidation about starting a new job fear
Merriam-Webster Online Thesaurus
trepidation (noun)the emotion experienced in the presence or threat of danger
SYNONYMS:
alarm ( alarum), anxiety, dread, fearfulness, fright, horror, panic, scare, terror, trepidationRELATED WORDS:
phobia; creeps, jitters, nervousness, willies; pang, qualm, twinge; agitation, apprehension, consternation, discomposure, disquiet, funk, perturbation; concern, dismay, worry; cowardice, faintheartedness, timidity, timorousnessNEAR ANTONYMS:
aplomb, assurance, boldness, confidence, self-assurance, self-confidence; bravery, courage, courageousness, daring, dauntlessness, doughtiness, fearlessness, fortitude, gallantry, hardihood, intrepidity, intrepidness, stoutness, valor; audacity, guts, nerve