Si Collection, Upper Volume
Radical: Water (shuǐ)
Entry: Qiu
Kangxi Stroke Count: 7
Page 605, Entry 07
Pronounced qiu.
As defined in Explaining Graphs and Analyzing Characters (Shuowen Jiezi), it describes floating or moving upon the water. In ancient times, the character for qiu was sometimes used to mean to sink or submerge. It is also written as qiu. According to the Collected Rhymes (Jiyun), it is also written as qiu.
Additionally, according to the Collected Rhymes (Jiyun), it is pronounced you. The words you, liu, and qiu share the same sound and meaning; they refer to the streamers on a banner, originally written as qiu. The character structure originates from the water radical, not from the character for square.