This document provides an overview of the use of ka'i words in Hawaiian grammar. Ka'i words like ka and ke introduce nouns and indicate definiteness, similar to the use of "the" in English. The document defines common ka'i words like he, ka, ke, kēia, kēlā, kēnā and explains the distinction between kēlā and kēnā which translate to "that (far)" and "that (near)". It also discusses using mau to make nouns plural and provides examples of its use.