Trustworthiness refers to a quality or characteristic that makes someone reliable, dependable and honest. It means being truthful, keeping your promises, and taking responsibility for one's actions. A trustworthy person is someone who can be relied upon to do what they say they will do, and to act in an ethical and moral manner. Trustworthiness involves integrity, sincerity, and a strong sense of fairness. It is the foundation of any healthy relationship, whether personal or professional.