Zi Collection, Middle Volume. Radical: Walk (chì). Page 394, Entry 12.
According to the Sound Rhymes (Jiyun), it is pronounced ban (falling tone), and it is the falling-tone variant of the character for a shallow basin. It means to walk. The character for an imperial carriage evolved from this character. The Original Meanings of the Six Writings (Liushu Benyi) explains it as meaning a companion.