Wei Collection, Middle Volume
Radical: Feather (yǔ)
Character: Wing
Kangxi Stroke Count: 10
Page 955, Entry 28
According to the Sound Collection of Classics (Jiyun), the form written as a variant is also written as this character. Additionally, according to the Correct Rhymes (Zhengyun), it is pronounced shi (falling-rising tone). It is the same as the character meaning merely or only.
As mentioned in the Book of Mencius (Mengzi): Why is it only food that is important?
As mentioned in the Book of Zhuangzi (Zhuangzi): Regarding the influence of yin and yang upon a person, it is not limited merely to the influence of one's parents.
Additionally, according to the Correct Rhymes (Zhengyun), it is pronounced shi (level tone). The phrase meaning not merely indicates that it is not limited to only this.