decorous

This term describes a refined adherence to social etiquette and a controlled outward demeanor. It suggests a deliberate effort to remain poised and appropriate, often in formal or solemn settings where emotional outbursts would be considered jarring or inappropriate. While similar to polite, it carries a heavier weight of dignity and traditional propriety. It is frequently used to describe behavior that is not just kind, but specifically aligned with the expected standards of a particular social class or a grave occasion.