Den vice refers to a person who wields power in a sneaky, underhanded or unethical manner. There are several synonyms for den vice that adequately describe this trait. Some common alternatives are cunning, duplicity, sneakiness, unscrupulousness, and deceitfulness. These words all convey a sense of someone who is willing to do whatever it takes to achieve their goals, even if it means disregarding ethical standards or betraying those around them. Other synonyms for den vice include treachery, betrayal, and perfidy. These words emphasize the deceptive nature of the person in question, and suggest that they cannot be trusted. Whether you call it den vice, duplicity, or something else, this behavior is a serious character flaw that can have a significant impact on those around the individual.