Which term best represents a person who shows contempt for those they consider unworthy?

The term that best represents a person who shows contempt for those they consider unworthy is "supercilious." This word describes an attitude of superiority, where someone behaves or speaks in a way that suggests they believe they are better than others. A supercilious person often looks down on others, dismissing their worth or importance, which perfectly captures the sentiment expressed in the question.

In contrast, "vaunt" refers to boasting about one's achievements, which does not imply contempt for others. "Venal" relates to being corrupt or motivated by bribery, lacking the element of disdain directed at others. "Succor" means to aid or assist someone in need, which embodies compassion rather than contempt. Thus, "supercilious" distinctly conveys the idea of disdainful superiority that aligns with the context of the question.