spectre
(US specter), / ˈspektə(r); `spɛktɚ/ n (fml 文)
1 ghost; phantom 鬼; 幽灵: haunted by spectres from the past 闹鬼的.
2 unpleasant and frightening mental image of possible future trouble （因可能出现困难而产生的）忧虑, 恐怖
The spectre of unemployment was always on his mind. 他心头一直萦绕著可能失业的恐惧感.