dishonorable

This word carries a heavy weight of social and moral condemnation. It describes behavior that doesn't just break a rule, but violates a sacred trust or a professional code of ethics. There is a strong element of 'shame' attached to it, implying that the person has lost their standing in the eyes of their peers. While "dishonest" refers to lying or cheating, "dishonorable" describes a deeper failure of character. It suggests a betrayal of one's own principles or the standards of an institution (like the military or a legal body). It is most frequently used in formal contexts, official proceedings, or when discussing high-stakes moral failures. In casual conversation, it can sound slightly archaic or overly dramatic unless referring to specific terms like a "dishonorable discharge."