trepidation
/ˌtrepɪˈdeɪʃən/noun
mass noun
1
- a feeling of fear or agitation about something that may happen（对可能发生的事的）惊恐, 悸惧, 不安：
the men set off in fear and trepidation.
这些人战战兢兢地出发了。
2
- archaic trembling motion〈古〉震颤, 颤抖。
词源
late 15th cent.: from Latin trepidatio （n-）, from trepidare 'be agitated, tremble', from trepidus 'alarmed'.