Which of the following is a synonym for "ruefully"?

The term "ruefully" describes a sense of regret or sorrow, often tinged with a bit of humor or irony. The correct answer, "sorrowfully," aligns perfectly with this meaning, capturing the essence of feeling sadness or remorse about something. This term emphasizes a reflective or melancholic state of mind, which accurately portrays the emotion associated with "ruefully."

The other options do not convey this sentiment. "Lightheartedly" suggests a carefree or cheerful attitude, which is completely opposite to the feeling of regret. "Joyously" implies a sense of happiness and celebration, further contrasting with the contemplative sorrow indicated by "ruefully." "Calmly" reflects a state of tranquility and peace, which also does not align with the emotional weight of feeling rueful.