The word "most gathering" may refer to an event or activity where a large number of people come together. Its antonyms would, therefore, be words that describe the opposite of a large and crowded gathering. Such antonyms could include "solitude," "isolation," "seclusion," "disperse," "scatter," and "individual." These words indicate a situation where people are dispersed, far apart, or simply not present. However, in some contexts, smaller gatherings with people who share a common interest or goal may be described using words like "intimate," "select," "exclusive," or "limited." In such cases, the antonyms for "most gathering" would be "public," "inclusive," or "general.