fiend

This term carries a sharp duality in modern usage. In its traditional sense, it evokes a feeling of pure malice or supernatural evil, often suggesting a lack of human empathy or a predatory nature. It is used to describe individuals whose cruelty is perceived as monstrous or inhuman. In a contemporary, informal context, the word shifts toward obsession. When paired with a specific interest, such as a coffee fiend or a fitness fiend, it describes an intense, almost compulsive passion. This usage is typically lighthearted or descriptive rather than judgmental, replacing the notion of evil with the notion of an insatiable appetite for a hobby or substance.