This thesis is a reference grammar of Nungon, a Papuan (non-Austronesian) language spoken by about 1,000 people in the southern Uruwa River valley, Kabwum District, Morobe Province, Papua New Guinea. Nungon forms the southern, higher-elevation, end of an elliptical dialect continuum with the Uruwa River at its center. This grammar focuses on the dialect of Towet village. Nungon is an agglutinating language with some fusion. Nouns, adjectives, and verbs are open classes. There are relatively few inflecting verbs, however; loans are incorporated with auxiliary verbs. Clauses are verb-final, and morphology is predominantly suffixing. Grammatical relations are marked with enclitics. Nungon is a clause-chaining language. Medial clauses have v...