Which term means "playful or merry" in music?

The term "Giocoso" is derived from Italian and specifically translates to "playful" or "merry" in the context of music. It instructs the performer to convey a joyful or lighthearted character in their playing or singing, suggesting a lively and spirited performance.

In contrast, "Energico" implies a forceful or vigorous style, while "Fortissimo" indicates a very loud dynamic, neither of which directly conveys the sense of playfulness associated with "Giocoso." "Grave," on the other hand, refers to a slow and serious manner, which starkly contrasts the lightheartedness suggested by "Giocoso." Therefore, "Giocoso" is the term that effectively embodies the spirit of being playful or merry in musical performance.