This section needs expansion. You can help by adding to it. (May 2008)
Classification is in dispute. Mark Donohue thinks it is related to Yoke, forming together the Lower Mamberamo family. On a 200 word list, they share 33%. Also there are some grammar similarities. According to Donohue, Warembori is heavily influenced by Austronesian languages to the west, in both vocabulary and grammar, Yoke is less influenced by them. More recent researchers (Dunn & Reesink, Foley, Kamholz) have classified Warembori and Yoke as papuanised Austronesian languages.[2] Malcolm Ross leaves Yoke unclassified due to lack of data, apparently referring to the fact that Donohue did not publish independent pronouns in Yoke. He did publish subject prefixes on verbs, which are very similar to Warembori, and the singular prefixes are also remarkably similar to two Kwerba family languages, namely Kauwera and Airoran, suggesting either borrowing or a distant relationship to Kwerba, though the Kwerba family shares almost no vocabulary with the Lower Mamberamo family. The Lower Mamberamo plural prefixes are similar to Austronesian, as are the plural object suffixes and, at least in Warembori, plural independent pronouns.
The light voiced stops /bd/lenite to [βr] between vowels within a word. The heavy stops do not lenite.
When a nasal is followed by a heavy plosive, it is lengthened, i.e. /mˀb/[mːb]/nˀd/[nːd]. When not followed by a stop, heavy nasals are long and preceded by a glottal closure, i.e. /ˀm/[ʔmː]/ˀn/[ʔnː]. Heavy consonants also attract stress.
The dual pronouns are derived from the plural via the infix⟨u⟩. This parallels the nearby Austronesian Cenderawasih languages, which derive the dual from the plural with du or ru, from *Dua 'two'. The plural pronouns ami, ki, mi, ti, in turn, appear to be Austronesian in origin, from *kami, *kita, *kamiu, *siDa (the latter via *tira). Although 3sg yi might also derive from Austronesian *ia, 1sg iwi and 2sc awi, the most basic pronouns, have no parallel in Austronesian. However, the basic pronouns iwi, awi, yi, ki, mi, ti resemble Yoke eβu, 'aβu, iβu, kiβu, miβu, siβu, illustrating the strong Austronesian influence on both languages.
Possessive prefixes on nouns are nearly identical to subject prefixes on verbs. The object suffixes are also similar; the paradigm is very close to that of Yoke, apart from an inclusive-exclusive distinction which is not completely grammaticalized in the case of possessives.
Possessive
Subject
Object
1sg
e-
i-, e-, ja-
-ewi, -e(o)
2sg
a-
u-, wa-, a-
-awi, -a(o)
3sg
i-, ∅-
i-, ja- ∅-
-i, -i(o)
1ex
ami
ami-, ama-, ame-
-mo, -m(o)
1in
ki-, ke-
ki-, ka-, ke-
-ki, -k(o)
2pl
mi-, me-
mi-, ma-, me-
-mi, -m(o)
3pl
ti-, te-
ti-, ta-, te-
-ti, -t(o)
The singular prefixes of Warembori and Yoke are nearly identical to the 1sg e-, 2sg a-, 3sg i- of the Kwerba languages Kauwera and Airoran. However, Kwerba has no more basic vocabulary in common with the Lower Mamberamo family than what is expected by chance.
^Foley, William A. (2018). "The languages of Northwest New Guinea". In Palmer, Bill (ed.). The Languages and Linguistics of the New Guinea Area: A Comprehensive Guide. The World of Linguistics. Vol. 4. Berlin: De Gruyter Mouton. pp. 433–568. ISBN978-3-11-028642-7.
Donohue, Mark (1999). Warembori. Languages of the World/Materials 341. München: Lincom Europa.
Rumaikewi, Luther, Lea Rumansao and Mark Donohue. 1998. Warembori Dictionary. Unpublished ms, University of Sydney.