The incubus, incubator, and cubicle all come from the Latin for "lie down" — a nightmare demon, a brooding hen, and your office workspace share the same root.
A male demon believed to lie upon sleepers, especially women, causing nightmares and feelings of suffocation; figuratively, any oppressive burden or influence.
From Latin incubus (nightmare, one who lies upon), from incubāre (to lie upon, to sit on, to brood), from in- (upon) + cubāre (to lie down, to recline), from Proto-Indo-European *kewb- (to bend, to lie down). Key roots: *kewb- (Proto-Indo-European: "to bend, to lie down").
The incubus shares its root with incubate and cubicle — all from Latin cubāre (to lie down). An incubus literally "lies upon" its victim, an incubator "lies upon" eggs, and a cubicle is a place for "lying down" (originally a bedroom). The medieval belief in incubi was so widespread that the 15th-century witch-hunting manual Malleus Maleficarum devoted extensive discussion