Antonyms for the word "more duty-bound" can vary depending on the context in which the term is being used. However, some common antonyms for "more duty-bound" include "less obligated," "less responsible," "carefree," "unrestricted," "liberated," and "free-spirited." These antonyms indicate a lack of obligation or responsibility, as opposed to being duty-bound. Someone who is less obligated may have more freedom to make choices and act in ways that are contrary to their duties and responsibilities. Conversely, someone who is duty-bound is expected to prioritize their responsibilities and adhere to a stricter code of conduct.