Which term is used to describe expressive behavior that indicates enthusiasm or grandeur?

The term "pomp" is used to describe expressive behavior characterized by grandeur, ceremonial magnificence, or ostentatious display. It often conveys a sense of enthusiasm, celebration, and elaborate presentation. Pomp is frequently associated with festivities, parades, and formal events where there is an emphasis on dramatic and impressive displays. For instance, royal ceremonies or state functions often exhibit pomp through their grandeur and formality, signifying importance and celebration.

In contrast, the other terms do not convey the same meaning. "Peccadillo" refers to a minor fault or sin, lacking the connotation of enthusiasm or grandeur. "Pluck" denotes courage or determination, and while it can be associated with spirited behavior, it does not inherently imply a grand or expressive display. Lastly, "pithy" describes language that is concise and forcefully expressive, but it does not encapsulate the notion of grandeur or ceremonial display that "pomp" does. Thus, "pomp" accurately reflects the concept of expressive behavior marked by enthusiasm and grandeur.