suc·cu·bus
noun/ˈsʌkjʊbəs/
/ˈsʌkjʊbəs/
(plural succubi
(literary)/ˈsʌkjʊbaɪ/
/ˈsʌkjʊbaɪ/
)- a female evil spirit, supposed to have sex with a sleeping man
（传说与睡眠中的男子交媾的）女淫妖 Word Originlate Middle English: from medieval Latin succubus ‘prostitute’, from succubare, from sub- ‘under’ + cubare ‘to lie’.