The term "most surfaced" can be described using a variety of antonyms that illustrate the opposite meaning of the phrase. For instance, "least surfaced" highlights the minimum amount of material exposed, while "hidden" represents elements that are entirely out of sight. Other antonyms that can be used include "submerged," which indicates items that have sunk beneath a surface or are situated beneath an uppermost layer, and "buried," which suggests objects that are covered or concealed beneath the ground. Moreover, "concealed" can be used to describe something that's kept secret or hidden from view, providing an opposite perspective to the notion of "most surfaced.