The case system distinguishes among nominative, accusative, genitive, comitative, instrumental and locative cases, but there are also a large number of nominal derivational affixes.
en.wikipedia.org Like in the first- and second-person pronouns, the accusative mostly normally the genitive, and the ending "-ih" in the dual forms is replaced with "-iju".
en.wikipedia.org This led to variants like "dagi" and "dage" (day, dative singular) and "tungon" and "tungun" (tongue, genitive, dative, accusative singular and nominative, dative, accusative plural).
en.wikipedia.org Prepositions take the dative or the accusative, but not the genitive, e.g. (formally) "despite the rain".
en.wikipedia.org