Mao Collection, Upper Volume
Radical: Heart (xīn)
忚
Kangxi strokes: 7
Page 377, Entry 05
Collection of Five Sounds (Wuyin Jiyun): Pronounced xi.
Master Yang's Dialects (Yangzi Fangyan): To deceive or slight.
Also, Collected Rhymes (Jiyun): Pronounced zhe. Xixi, the appearance of a heart lacking desire.
Also, Collected Rhymes (Jiyun): Pronounced xi. Meaning is the same.