Japanese horse chestnut, (ghost kanji)
This rare kanji is listed as a ghost character with the meaning "Japanese horse chestnut," but its actual usage and meaning are uncertain. Treat its meaning as unclear.
The origin of 挧 is unclear. It is recorded as a ghost kanji with no established historical development.
The hand radical 扌 beside 羽 (feathers) could suggest handling something light or plant-related, but the meaning is uncertain.
For ウ, imagine a ghostly "oo" sound echoing from the chestnut tree: oo -> ウ, but the reading is as uncertain as the kanji itself.