The antonyms for the term "most subsequential" are "least frequent," "least ensuing," "least consecutive," "least succeeding," "least subsequent," "least sequential," and "least progressive." These antonyms signify the opposite of what "most subsequential" connotes. For instance, "least frequent" suggests a lack of frequency or irregularity, while "most subsequential" implies events taking place in a sequence. Similarly, "least ensuing" and "least consecutive" evoke the idea of disruption or discontinuity, whereas "most subsequential" indicates events happening in order. In conclusion, the antonyms of "most subsequential" represent the reverse of the sequence or order, marking a lack of sequence or development.