He whakatakotoranga toka ki roto i te kirinuku, he putunga wai kei roto. Ka pupū ake te wai o te mātāwainuku i te puna māori, ka taea rānei te papu kia puta ki runga.
A formation of rock in the Earth's crust which contains a storage of water. The groundwater in the aquifer comes to the surface as a natural spring, or it can be pumped to the surface.
Hei whakaatu i te mātāwainuku:
mātā (mātāpuna) - source
wainuku - groundwater