Which term relates to an appearance of superiority?

The term "imperious" is closely associated with an appearance of superiority because it conveys a sense of commanding authority or overbearing attitude. When someone is described as imperious, it often implies that they believe themselves to be above others, exhibiting a domineering presence that suggests superiority. This term derives from the Latin word "imperium," which relates to command and power, reinforcing the notion of someone who holds a superior position or attitude.

In contrast, the other terms do not carry the same connotation. "Persistent" refers to dogged determination and continual effort in the face of obstacles, devoid of any implication of superiority. "Aptitude" pertains to one's natural ability or talent for a particular skill, which is more about capability than the perception of being superior. "Dulcet" describes something that is sweet and soothing, typically in reference to sounds, and does not align with the idea of superiority at all. Hence, "imperious" is the term that best captures the essence of appearing superior.