喜 is used in: 喜欢 (to like), 恭喜 (congratulations), 喜事 (happy event), 喜剧 (comedy), 惊喜 (surprise), 欢喜 (joyful). 双喜 (double happiness) 囍 is a famous symbol used at Chinese weddings.
culture
The double happiness character 囍 (shuāngxǐ) — two 喜 side by side — is the iconic symbol of Chinese weddings. You'll see it on red decorations, invitations, and wedding gifts everywhere.