What word describes an attitude of overconfidence?

The word that best describes an attitude of overconfidence is "arrogance." Arrogance refers to an exaggerated sense of one’s own importance or abilities, often leading to a dismissive or condescending behavior towards others. When someone displays arrogance, they typically believe they are superior or more capable than others, which can lead to a lack of humility and an inflated self-esteem. This term captures the essence of overconfidence by emphasizing not only self-assurance but also an unwillingness to acknowledge one’s limitations or the value of others’ contributions.

The other terms do not convey the same meaning. Apathy refers to a lack of interest or concern, which does not relate to confidence. "Sect" denotes a subgroup or faction, particularly within religious or philosophical contexts, and does not pertain to attitudes at all. "Residual" describes something that remains after the main part is gone, which is unrelated to the theme of overconfidence or attitudes. Thus, "arrogance" is the most appropriate choice for an attitude characterized by overconfidence.