The word "undutiful" refers to behavior that is disrespectful or disobedient to those in authority. Therefore, antonyms for "more undutiful" would be behavior that is respectful, obedient, and dutiful. This could include actions such as showing loyalty, following instructions, and adhering to rules and guidelines. Antonyms may also include words such as dutiful, compliant, obedient, respectful, loyal, and compliant. When individuals exhibit these opposite traits, they are more likely to earn the respect and trust of those in authority, leading to positive and productive relationships.