Most freethinking refers to an individual who is open-minded and independent in their thoughts and beliefs. The term 'most' indicates the highest degree of freethinking, leaving little room for antonyms. However, some possible antonyms for freethinking could be close-mindedness, conformity, dogmatism, rigidity, and traditionalism. These terms describe people who adhere to strict rules and conventions, and they are less likely to entertain novel, daring, or unorthodox ideas. Unlike freethinkers, individuals who exhibit these tendencies may be more rigidly attached to their beliefs, and they may reject alternative perspectives. Therefore, the antonyms of 'most freethinking' are those that signify a lack of open-mindedness and creativity.