Demonology

noun a small, mischievous devil or sprite

• The imp was a mischievous creature in the folklore of medieval Europe.
• Watch out for that imp, he's always causing trouble.
• I can't stand that imp, he's so annoying.
• The imp of procrastination whispered in my ear, urging me to put off my work.

noun A cause of distress or anxiety

• The incubus is a demon in male form that preys on sleeping women.
• Some people believe that an incubus is responsible for their sleep paralysis.
• I heard a story about a guy who claimed to have been visited by an incubus in his dreams.
• The oppressive heat felt like an invisible incubus weighing down on the city.

noun a powerful and malevolent supernatural being in Islamic mythology

• According to Arabian folklore, an ifrit is a powerful and malevolent supernatural creature.
• I heard a story about an ifrit that haunted a small village in the desert.
• Some people believe that ifrits are just misunderstood spirits.
• The ifrit of jealousy consumed her heart, causing her to act irrationally.