The term "most canonic" can be considered as a representation of a state of higher standard or authority. Some antonyms for most canonic could include "least authoritative," "least significant," "least respected," "least credible," "least notable," "least reputable," "least reliable," "least influential," "least dependable," "least accepted," "least popular." These antonyms convey a sense of limiting the standards, abilities, or qualities of a thing or person in comparison to the "most canonic." However, it is essential to note that antonyms are subjective words that can vary based on perspective, context, and situation.