kauvai

kauvai, n. Body of (usually fresh) water, river.

Kā ‘oe tāua i te vaka ki tēta‘i tua i te kauvai.
Let’s paddle the canoe to the other side of the river;

Kua kō rātou i te ara kauvai ‘ei ‘akata‘e i te vai ki roto i te repo taro.
They dug a channel to run the water into the taro swamp. [kau-5, vai1.]