(CNN)British backpacker Grace Millane should have been safe on her trip to New Zealand, a place that prides itself on manaakitanga, the country's prime minister said Jacinda Ardern invoked manaakitanga -- a word from the Maori, New Zealand's indigenous Polynesian people, meaning hospitality -- in delivering an apology to the 22-year-old's family. She was speaking during her weekly post-Cabinet news conference, Radio New Zealand reported.