What is incubus? How to use in English

The word "incubus" derives from the Latin word "incubus," which means "male night spirit" or "demon who lies on top of a sleeping woman." In medieval times, incubi were believed to prey on women during their sleep, causing them to have disturbing and often erotic dreams. It was thought that these experiences could lead to physical impregnation by the demon, resulting in the birth of demonic offspring. The belief in incubi and their female counterparts, the succubi, who seduced men in their dreams, was a part of medieval European folklore and religious tradition. The word "incubus" is still used today in some religious and supernatural contexts, such as in horror fiction or as a term for a recurring dream that causes discomfort or anxiety.