succubus
/ˈsʌkjʊbəs/noun
(pl.succubi /-baɪ/)
- a female demon believed to have sexual intercourse with sleeping men（传说中与熟睡男子交媾的）女妖。
词源
late Middle English: from medieval Latin succubus 'prostitute', from succubare, from sub- 'under' + cubare 'to lie'.