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出典:Wiktionary
出典:『Wiktionary』 (2010/08/21 20:53 UTC 版)
From Japanese nunchaku; in Japanese a u at the end of a word is not pronounced. Therefore, when English speakers heard nunchaku, it became nunchak, and in the written form familiarized to nunchuck.
nunchucks (複数形 only)
nunchucks