kauaka - Negative word, do not (variant of kaua; eg: Kauaka e tangi)
Kauaka, ad. 1. Used with an imperative, not.
Kauaka te korero e komuhua ki te tara whare (M. 287).
2. Without a verb, do not, don't. Ka mea atu a Tane-mahuta, “Kauaka” (T. 3).
Williams Dictionary