name of a Chinese river
浙 is a proper noun referring to a specific Chinese river. It has no general conceptual meaning beyond this geographical name.
浙 combines the water radical 氵 with 折, which likely provides the sound. It is used as a proper name for a river in China.
The water radical 氵 beside 折 suggests a river whose name sounds like 折. Think of the Zhe River in China.
For セツ, imagine a set of boats on the Zhe River: set -> セツ, and the river is named 浙.
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