kaiwero
1. (noun) challenger - the man who does the wero during the pōhiri, the ritual of encounter.
Kātahi ka kōkiri te matua a Ngāti Raukawa. Ka motu mai ki te ara, ka haere te kaiwhakatakoto i te mānuka, i muri e whana atu ana te kaiwero - ko Kemene Piharau o Wairarapa (TWMNT 12/12/1872:150). / Then Ngāti Raukawa's army thrust forward. When they had moved some distance the man laying down the challenge stick went forward and after that the challenger, Kemene Piharau of Wairarapa, sprang forward.