Which word best describes someone who shows sorrow?

The word "dolorous" is an excellent descriptor for someone who shows sorrow. It is derived from the Latin word "dolor," which means "pain" or "sorrow." When used to describe a person, "dolorous" conveys a deep sense of grief or lamentation, capturing the emotional weight associated with sorrow. This makes it the most suitable choice for the context of expressing sorrowful feelings.

In contrast, the other options do not convey a sense of sorrow. "Erudite" pertains to having great knowledge or learning, often indicating someone who is scholarly or well-educated. "Chasten" refers to the act of punishing or restraining in order to correct or discipline, which does not directly relate to showing sorrow. "Magnanimous" describes a person who is generous or forgiving, especially toward a rival or less powerful individual, and while it reflects a noble character, it does not encompass the notion of sorrow. Thus, "dolorous" stands out as the most fitting choice for someone expressing sorrow.