How would you describe someone who mistreats others verbally or emotionally?

The term "abusive" is the most appropriate choice for describing someone who mistreats others verbally or emotionally. This word specifically captures the severity and harmful intent behind such behavior. It implies a pattern of behavior that is damaging, not just to the recipient's feelings but also to their overall well-being. "Abusive" encompasses a range of mistreatment, including both verbal and emotional abuse, indicating that the person engages in behaviors that are cruel, demeaning, and intended to exert control or power over others.

Other terms like "rude," "offensive," and "harsh" can describe negative behaviors but lack the depth and implications of severe emotional harm that "abusive" conveys. "Rude" suggests a lack of manners or respect, whereas "offensive" relates to causing annoyance or displeasure but may not involve direct malice. "Harsh" describes a level of severity or intensity but doesn't necessarily indicate the emotional or psychological harm that "abusive" does. Therefore, "abusive" accurately reflects the seriousness of the verbal or emotional mistreatment in question.