The term "most legalized" signifies something that has been authorized or validated for maximum allowance by legal standards. It has a positive connotation and implies legitimacy. Antonyms for most legalized would therefore encompass terms that denote an absence or lack of legality or invalidity. These could include words such as illegal, prohibited, criminalized, unapproved, banned, illicit, unauthorized, unsanctioned, clandestine, or unlawful. These terms suggest something that is outside the law, lacks proper authorization, or may be subject to punishment or penalty. It is important to understand antonyms to help depict context and meaning effectively.