spectre
/ˈspektə(r)/( <美> specter)
noun
1- a ghost鬼怪, 幽灵。
1.1
- something widely feared as a possible unpleasant or dangerous occurrence似幽灵一样令人恐惧的事物：
the spectre of nuclear holocaust.
核毁灭的恐怖。
词源
early 17th cent.: from French spectre or Latin spectrum （see SPECTRUM）.