ia nā
1. (particle) then, indeed, therefore - words to add emphasis, including to questions and commands. Sometimes written as one word, i.e. iana.
He tika ia nā. / That's very true.
Tēnā iana, whakaarohia te rerekētanga o te mita o te reo Ingarihi o te Kōtimana, o te Tatimana, o te Tiamana, o te Marikena, o ngā tōpito tonu o te whenua o Ingarangi! (HM 1/1997:6). / Then consider the differences in the accent of the English language of a Scotsman, a Dutchman, a German, an American and of the different parts of England.
See also ina