Dún means person. The plural is liudí. It means persons or people (a group of persons). This form is both the nominative and accusative. It looks like masculine nouns do not distinguish between these two cases. Feminine nouns appear to, that is an entry for another day.
The accusative noun governs the following prepositions: keresh, kasha, ishísha, pena, kakon, ishakon, kablekag, ishíblekag, kabalek, ishíbalek, kapena, ishí ishípena, kanì, ishínâ.
The genitive case is dúnies and liudí. A possessed noun is ya dúnies and ya liudí. The genitive case governs the following prepositions poslí, kú, kot, do, korom, ishísha, bo, and besh.
The dative case is dúnie and liudien. It governs the following prepositions: e, po and pena.
The instrumental case is dúniom and liudimí. It governs the prepositions: nisha, nakon, nibon and wa.