Antonyms for the word "most outsize" include small, tiny, diminutive, minuscule, microscopic, and puny. These antonyms are used to describe something or someone that is significantly smaller than the norm. Additionally, these words can convey a sense of insignificance or unimportance. For example, instead of saying "most outsize elephant," one might say "small elephant" or "tiny elephant." The use of these antonyms can change the entire tone of a sentence or passage, creating a sense of contrast and emphasis. Thus, antonyms play a vital role in language and communication, allowing us to express different meanings and perspectives.