tāuru
1. (noun) headwaters, source (of a stream or river).
Ka hāwhe māero ahau e haere ana me tōku hōiho he mea ārahi e au, ka tae ahau ki runga ki te tāuru o te awa o Mikonui (TW 2/3/1878:105). / For half a mile I travelled with my horse, which I was leading, when I reached the headwaters of the Mikonui River.