Most barrelling means something that has the highest level of speed or intensity. When looking for antonyms for this word, we can explore words such as slow, relaxed, unhurried, moderate, and gentle. These words depict something that moves at a slower pace, without any rush or urgency. Unlike most barrelling, these words suggest a gradual process that is not in a hurry. For instance, "the slow and gentle-paced snail" is the opposite of "the most barrelling hare." Therefore, these antonyms provide a contrasting meaning to the word most barrelling, and they give us a better understanding of the concept.