What term refers to the act of showing strong dislike or aversion towards others?

The term that refers to the act of showing strong dislike or aversion towards others is malevolence. This word embodies an attitude or disposition characterized by a desire to harm others or see them suffer. In psychological and social contexts, malevolence can manifest as hostility, animosity, or ill will. It conveys a deep-seated feeling that is often associated with negative intentions towards another individual or group.

In contrast, the other options encompass positive or neutral feelings. Affection is associated with warmth and fondness, sympathizing implies sharing understanding or concern for someone's feelings, and warmth denotes friendliness or kindness. These alternatives do not convey dislike or aversion, making malevolence the term that accurately captures the sentiment described in the question.