Hai Collection, Upper Volume
Radical: Fight (dòu)
Character: xi
Kangxi stroke count: 18
Page 1457, Entry 37
Pronounced xi (falling tone).
According to the Explanation of Graphs and Analysis of Characters (Shuowen Jiezi), it means constant contention. It is composed of the radical for fight and the character for child, denoting a child prone to quarreling.
Book of Odes (Shijing), Lesser Odes: Brothers quarrel within the walls.
Commentary: To quarrel is to be obstinate.
In the Er-ya (Er-ya), it is defined as resentment.
Annotation: To bear mutual resentment.
In the Dialects (Fangyan) by Yang Xiong (Yangzi), it means fear. In the regions of Song and Wei, when one is angry to the point of choking or gasping, it is called xiexi.
Also interchangeable with the character meaning silent (qu).
Book of Changes (Yijing), Hexagram of Abundance (Feng Gua): Silent as if there were no one there. The commentary notes that Yao wrote it as xi, while Meng wrote it as zhi; they are interchangeable.
Also, according to the Collection of Rhymes (Jiyun), pronounced he (entering tone). The meaning is the same.