Which of the following best describes the word "ruefully"?

The word "ruefully" is derived from the adjective "rueful," which conveys a sense of sorrow or regret for something that has happened. When someone expresses something ruefully, they are typically reflecting on past actions or decisions with a sense of remorse or sadness. This emotional nuance is captured well by the term "regretfully," which directly conveys that feeling of wishing something had been different or expressing sorrow over a situation.

The other choices do not align with the meaning of "ruefully." "Joyfully" suggests happiness or elation, "proudly" indicates a sense of pride or satisfaction, and "indifferently" implies a lack of interest or concern. None of these terms convey the nuanced sentiment of regret that "ruefully" embodies, making "regretfully" the most accurate descriptor.