Devil
Greek is "diabolos," which means accuser. The greatest of all the fallen angels. He opposes God and is completely evil. He is often called Lucifer which is a Latin translation of "light bearer" found in Isaiah 14:12, and also the accuser of the brethren in (Rev. 12:10), dragon (Rev. 12:9), the devil (Matt. 4:1), the tempter (Matt. 4:3), the accuser (Rev. 12:10), the prince of demons (Luke 11:15), the ruler of this world (John 12:31), See Isaiah 14:12-15 for a description of the fall of the devil. Upon Jesus' return, the Devil will be vanquished -- depending on the eschatological position. His future is the eternal lake of fire.