Tagi Sina - What does it mean?

Sina is crying
Sina is crying
She is calling "please bring back the boat"

The people of Tokelau were taken by South American slave traders between 1850 and 1872. By 1872 the population of Tokelau was down to eighty people, mainly old men and women and little children. This song expresses the sadness and desperation felt by those left behind.

Tagi Sina
Ko kalalaga tuku mai te vaka e
Ko kalalaga tuku mai te vaka e
Ko kalalaga tuku mai te vaka e
Ko kalalaga tuku mai te vaka e
Aue Tokelau / Kua fita ki tatou
I faifaiga venei

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And thanks to Wikipedia - Tokelau is a territory of New Zealand that consists of three tropical coral atolls in the South Pacific Ocean.

And Lonely Planet says... Tokelau's name is Polynesian for north wind, and it's one of the most isolated places on earth. It takes 20 hours to sail there from its nearest neighbour, Samoa, and you can forget about flying - there's no airstrip. It's largely due to this remote factor that indigenous culture has been preserved on Tokelau to a far greater degree than elsewhere in the Pacific.