joy的形容词形式是joyful.

joyful：.adj.高兴的、快乐的、令人愉快的.

相关介绍

The meeting with the old comrades-in-arms is a joyful one.

与老战友的那次聚会是一次欢乐的聚会。

This joyful show will please everyone, from the youngest to the oldest.

这场欢乐的演出将取悦各个年龄段的人。

Life should not only be competitive but also be joyful.

生活不应只是竞争，生活也应是喜悦的。