What word is defined as acting with great attention to moral principles and standards?

The word "scrupulously" refers to acting with great attention to moral principles and standards, emphasizing a strong sense of ethics and integrity in one's actions. This term originates from the word "scruple," which means a feeling of doubt or hesitation regarding the morality of an action. When someone is described as scrupulous, it indicates that they adhere closely to their moral compass and are conscientious in ensuring their actions align with their ethical beliefs.

In contrast, while "meticulously" focuses on being very careful and precise in task execution, it does not specifically address moral considerations. "Honestly" conveys truthfulness but does not encompass the broader commitment to moral standards that scrupulously implies. "Carefully" suggests a general attentiveness to detail or caution but lacks the specific moral context associated with scrupulously. Therefore, scrupulously is the most fitting term when describing action driven by strong moral principles.