1. A passive ending and the one most commonly used with words of more than two vowels, including borrowed words. It is also used for passive agreement for tonu, rawa, kau, noa, kē, katoa and bases acting as a modifier following a verb in the passive.

(Te Kākano Textbook (Ed. 2): 65-67, 84-85; Te Pihinga Textbook (Ed. 2): 91-92;)