What word describes someone with an excessive sense of self-worth?

The term that best describes someone with an excessive sense of self-worth is "pompous." This word refers to a person who exhibits an inflated sense of their own importance or is overly self-satisfied. Pompous individuals often present themselves in an arrogant or ostentatious manner, believing they are superior to others.

In the context of self-worth, being pompous implies not just having confidence or pride but crossing into an exaggerated self-esteem that can come off as boastful or pretentious. This understanding of the term highlights how such attitudes can alienate others due to the lack of humility and a tendency to seek attention for one's achievements or status.

The other terms do not carry the same connotation of inflated self-worth. "Portent" refers to an omen or sign, and "plea" signifies a request or appeal, both of which do not relate to self-perception. "Pivotal" describes something of great importance or crucial to a situation, which also does not connect to individual self-worth. Thus, "pompous" is the most appropriate word for someone who has an excessive sense of self-worth.