"Diabolical" refers to something that is wicked, evil, or devilish in nature. It often describes actions, plans, or characters that are malicious and intended to cause harm or suffering. The term is derived from the word "diablo," which means "devil" in Spanish, emphasizing its association with malevolence. In literature and film, a diabolical character is typically one who embodies traits of cunning and deceit. These characters often create complex schemes to achieve their goals, making them intriguing yet dangerous. Examples of diabolical figures can be found in works featuring villains like Iago from Shakespeare's "Othello" or Hannibal Lecter from "The Silence of the Lambs."