What term best describes a feeling of displeasure or hostility?

The term that best describes a feeling of displeasure or hostility is anger. Anger is an emotional response that is often a result of perceived threats or injustices. It can manifest in various ways, such as irritation, frustration, or rage, and is typically directed towards someone or something that has caused discomfort or harm.

While fear, sadness, and frustration involve negative feelings, they do not align as closely with the specific attributes of displeasure and hostility associated with anger. Fear relates to a sense of danger or apprehension, sadness is linked to feelings of loss or unhappiness, and frustration emerges from the inability to achieve a desired goal or outcome. Thus, anger is the most fitting term when describing a direct emotional response characterized by displeasure and hostility.