incubus

/ˈɪŋ.kjʊ.bəs/noun
High School
1

An evil spirit supposed to oppress people while asleep, especially to have sex with women as they sleep.

2

A feeling of oppression during sleep, sleep paralysis; night terrors, a nightmare.

3

Any oppressive thing or person; a burden.

4

One of various of parasitic insects, especially subfamily Aphidiinae.

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