The antonyms for the term "most pervasive" would be words such as scarce, uncommon, and sporadic. When something is considered pervasive, it is present throughout and has a widespread impact. Therefore, words like rare, infrequent, and peripheral provide the opposite meaning. "Scarce" means a resource or something is limited or restricted. Similarly, "uncommon" is something unusual or not visible. "Sporadic" refers to something happening at irregular intervals. These antonyms help to highlight what something is not, which provides a better understanding of the term "most pervasive.