The name "Devil" derives from the Greek word diabolos, which means "slanderer" or "accuser". In mainstream Christianity, God and the Devil are usually portrayed as fighting over the souls of humans, with the Devil seeking to lure people away from God and into Sheol. The Devil commands a force of lesser evil spirits, commonly known as demons. The Hebrew Bible (or Old Testament) does not assign this level of personification to the devil; there, the Adversary (Ha-satan) is a servant of God whose job it is to test humankind.
This entity is commonly referred to by a variety of names, including Abbadon, Angra Mainyu, Satan, Asmodai, Beelzebub, Lucifer, Belial, and Iblis. Many other religions have a trickster or tempter figure that is similar to the Devil. Modern conceptions of the Devil include the concept that it symbolizes humans' own lower nature or sinfulness.
People put the concept of the Devil to use in social and political conflicts, claiming that their opponents are influenced by the Devil or even willingly supporting the Devil. The Devil has also been used to explain why others hold beliefs that are considered to be false and ungodly.