incubus
Incubus (noun) means In medieval European folklore, a male demon believed to settle on people as they sleep and cause nightmares. Example: “The manuscript describes an incubus pressing on the sleeper's chest.”
How to use incubus
Learner’s notesIn plain EnglishA demon from old stories that was said to sit on you while you slept.
Literary and historical; the figurative sense is rare and quite formal.
The word nightmare originally meant much the same thing — a 'mare' was a spirit that pressed on sleepers.
Trace the full origin ↓Fill the gap
Can you complete this real example?
The manuscript describes an _____ pressing on the sleeper's chest.
Etymology
From Late Latin incubus 'nightmare', from incubare 'to lie upon'.