Wu Collection, Middle Volume
Radical: Sickness (nì)
Kangxi Strokes: 5
Page 769, Entry 01
Pronounced nie. Indicates illness.
Shuowen Jiezi (Analytic Dictionary of Characters) states the meaning is to lean. When a person is ill, it is as if they are leaning against something.
Jiyun (Collection of Rhymes) notes the ancient seal script (zhòuwén) form is written as ding.
Also pronounced chuang. The meaning is the same.