The word "occult" comes from the Latin "occultus," meaning "hidden" or "concealed ... rituals, the study of symbols and ...

This is the world of the occult ... the appearance of magical symbols or heavy-metal monsters but the investigation and uncovering of forbidden lore, secret societies, and elaborate rituals.

Grau also ensured that a contract between Orlok and his assistant that appears onscreen featured occult and alchemical markings, as well as Enochian symbols, said to be the language of angels.