The term "Assassin" has its origin from the Arabic word "Hashshashin," which means "those who use hashish." The Hashshashin were a group of Nizari Ismaili Muslims who lived in Alamut Castle in Iran during the 11th and 12th centuries. They were known for their use of hashish, which they believed gave them supernatural powers to fight against their enemies. However, over time, the term "assassin" has come to be associated with a person who commits murder, especially political assassination, as an act of revenge or to achieve some goal.