Yin Collection, Lower Volume
Radical: Bow (gōng)
Page 356, Entry 21
Pronounced wu.
Shuowen Jiezi (Explanation of Simple and Compound Characters) defines it as drawing a bow fully to aim in a certain direction. Guangya (Expanded Elegantia) defines it as to open or stretch. Also, Yupian (Jade Chapters) defines it as to hold, to direct, or to pull.
Additionally, pronounced ku. The meaning is the same. Guangyun (Expanded Rhymes) lists a variant form.