How do you say joy in Chinese?
— 歡喜, 欢喜 (huānxǐ), 歡樂, 欢乐 (huānlè), 喜悅, 喜悦 (xǐyuè)

Related synonyms for joy in Chinese
pleasure欢乐
Derivative terms for joy in Chinese
please請, 请 (qǐng), 拜托 (bàituō)