Typology
Dâw and Hup—especially Hup—have undergone grammatical restructuring under Tucano influence. They have lost prefixes but acquired suffixes from grammaticalized verb roots. They also have heavily monosyllabic roots, as can be seen by the reduction of Portuguese loan words to their stressed syllable, as in Dâw yẽl’ "money", from Portuguese dinheiru. Nadëb and Nïkâk, on the other hand, have polysyllabic roots. Nïkâk allows a single prefix per word, whereas Nadëb, which lies outside the Vaupés language area, is heavily prefixing and polysynthetic: Up to nine prefixes per word (which is highly unusual for the Amazon), with incorporation of nouns, prepositions, and adverbs.
Read more about this topic: Nadahup Languages