無患子
Noun
unclassified name
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noun (common) (futsuumeishi)
word usually written using kana alone
Indian soapberry (Sapindus mukorossi);Chinese soapberry;washnut;soapnut tree
羽子板で突く羽の玉は「むくろじ」という大木の種です。
The feathered balls you hit with a battledore are the seeds of a large tree called 'soapberry'.
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Mukuroji