The term "most unprohibited" refers to something that is not restricted or forbidden. Therefore, its antonyms would be words that convey constraints or limitations. Some antonyms of the phrase would include words such as "restricted," "prohibited," "controlled," "governed," "constrained," and "regulated." These words suggest that something is either prohibited, censured, or restricted, which is the exact opposite of being unprohibited. This applies to situations when laws, rules, or moral principles impede people from acting or expressing themselves without limitation. In essence, the antonyms of "most unprohibited" signify a condition of restriction, control, or inhibition.