Which term best indicates a strong emotional repulsion?

The term that best indicates a strong emotional repulsion is "abhor." This word specifically conveys a deep-seated disgust or hatred towards something. When someone abhors an idea, action, or object, it reflects an intense level of aversion that goes beyond mere dislike, indicating a strong emotional reaction that involves moral or ethical disapproval.

In contrast, the other terms do not capture this sense of disgust. "Usurp" refers to the act of taking a position of power or importance illegally or by force and does not relate to emotional responses. "Tactful" describes a sensitivity in dealing with others or with difficult issues, emphasizing diplomacy rather than emotional repulsion. "Unanimity" indicates agreement by all people involved, focused on consensus rather than emotional feelings. Thus, "abhor" stands out as the term that most accurately conveys a strong sense of emotional repulsion.