kör

/ kør /

Cases

SingularPluralWhen to use it
nominative kör the grave körle the graves the plain dictionary form — the doer of the sentence
genitive körnü the grave's körleni the graves' the owner — whose it is
accusative körnü the grave (as the object) körleni the graves (as the object) a specific, known object — whom or what
dative körge to the grave körlege to the graves direction or recipient — to where, to whom
locative körde at / in the grave körlede at / in the graves where it is; also having — mende bar, "I have it"
ablative körden from the grave körleden from the graves 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 körüm my grave körlerim my graves
your körüŋ your grave körleriŋ your graves
his / her körü his / her grave körleri his / her graves
our körübüz our grave körleribiz our graves
you all's körügüz you all's grave körlerigiz you all's graves
their körleri their grave körleri their graves

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