Definition of 「怬」:
1. Joyful.
2. Rest.
(*Quoted from traditional dictionary explanation)
【Verb】
1. Joyful. "怬, 忻也." (From "Yupian · Heart Section")
2. Rest. "怬河林之蓁蓁兮, 伟关雎之戒女." (From "Wenxuan · Zhang Heng · Si Xuan Fu") "太和二年来延唐寺, 数乎菩隄, 怬乎禅那." (Tang Dynasty, Duan Chengshi, "Stela of Venerable Jizhao")