aua hoki
1. (particle) I don't know, goodness knows, how should I know? don't ask! I don't have a clue - depending on the intonation, sometimes this can have connotations of not caring, or how could one possibly know, or implying that one shouldn't ask the question.
Pare: Kei te tika anō ngā kōhimuhimu mō Haki rāua ko Hira? Rangi: Aua hoki. Kei mahara koe ko au tō rāua kaiwhakaaweawe (HKK 1999:169). / Pare: Are the rumours about Jack and Jill correct? Rangi: I don't know. You shouldn't think that I am their go-between.