oroi
1. (verb) (-a) to sharpen (by rubbing).
Tēnei te hōanga te takoto i raro nei, waiho kia oroia ana he whati toki nui (M 2006:462). / This is the grindstone lying on the ground, left for a broken axe to be sharpened.
Synonyms: whakakoi, whakakoikoi