Chinese character 癚

A foolish or vacant-looking appearance.

The Song-era Chinese rhyme dictionary Jiyun, a reference that groups characters by rhyme, records 癚 with this sense; the work was completed in 1039. The later Kangxi Dictionary also glosses it as foolish. Those dates a dictionary record, not the character’s creation.

The written form brings together 疒, the sickness radical, and 詹. Its recorded sense describes an appearance but does not say whose; the surrounding words supply that context.