The antonyms for the phrase "more adherent" are "less attached," "uncommitted," "disloyal," and "unfaithful." These words describe individuals who lack dedication or are hesitant to commit to a particular cause or belief. Such people are usually fickle and can be easily swayed or influenced by external factors. They may also lack the discipline required to follow through with their commitments or keep their promises, whether in personal or professional settings. On the other hand, the antonym for "more adherent" can also be "unconnected" or "separated," indicating a complete lack of attachment or commitment to a particular person or cause.