The antonym for "doeth on sly" refers to actions that are open and honest. Such actions involve transparency, authenticity, and integrity, and are characterized by honesty and straightforwardness. Synonyms for this antonym include "aboveboard," "forthright," "genuine," "sincere," and "transparent." When we act with these values in mind, we build trust and credibility, both personally and professionally. These values also align with ethical and moral principles, ensuring that our actions are in line with what is right and just. In contrast, "doeth on sly" actions can be deceitful or manipulative, leading to negative consequences for ourselves and others.