nun·cha·ku (nən-chä'kōō) n. A pair of hardwood sticks joined by a chain or cord and used as a weapon. Often used in the plural.
[Okinawan Japanese, probably from Chinese (Taiwanese) neng-cak, type of farm implement, equivalent to Chinese (Mandarin) ling, two, paired + Chinese (Mandarin) záo, to dig, digger.]