name of a Chinese river
汾 is a proper noun referring to a specific Chinese river. Its meaning is limited to that geographic name.
汾 combines 氵 (water) with 分, which likely provides the sound. It was created as a specific river name.
The water radical 氵 beside 分 suggests a river that divides or branches, fitting a named Chinese river.
For フン, imagine the river's fun sound: fun -> フン, as the water flows playfully.
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fenjiu (distilled Chinese alcohol made from kaoliang)