adet

/ adet /

Cases

SingularPluralWhen to use it
nominative adet the custom adetle the customs the plain dictionary form — the doer of the sentence
genitive adetni the custom's adetleni the customs' the owner — whose it is
accusative adetni the custom (as the object) adetleni the customs (as the object) a specific, known object — whom or what
dative adetge to the custom adetlege to the customs direction or recipient — to where, to whom
locative adetde at / in the custom adetlede at / in the customs where it is; also having — mende bar, "I have it"
ablative adetden from the custom adetleden from the customs where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
my adetim my custom adetlerim my customs
your adetiŋ your custom adetleriŋ your customs
his / her adeti his / her custom adetleri his / her customs
our adetibiz our custom adetleribiz our customs
you all's adetigiz you all's custom adetlerigiz you all's customs
their adetleri their custom adetleri their customs

The overlap in the last rows is real, not a mistake: adetleri can mean "his / her customs", "their custom", or "their customs" — context decides.