köpçek

/køptʃek/

Cases

SingularPluralWhen to use it
nominativeköpçekthe saddle padköpçeklethe saddle padsthe plain dictionary form — the doer of the sentence
genitiveköpçeknithe saddle pad'sköpçeklenithe saddle pads'the owner — whose it is
accusativeköpçeknithe saddle pad (as the object)köpçeklenithe saddle pads (as the object)a specific, known object — whom or what
dativeköpçekgeto the saddle padköpçeklegeto the saddle padsdirection or recipient — to where, to whom
locativeköpçekdeat / in the saddle padköpçekledeat / in the saddle padswhere it is; also having — mende bar, "I have it"
ablativeköpçekdenfrom the saddle padköpçekledenfrom the saddle padswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
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
myköpçegimmy saddle padköpçeklerimmy saddle pads
yourköpçegingyour saddle padköpçekleringyour saddle pads
his / herköpçegihis / her saddle padköpçeklerihis / her saddle pads
ourköpçegibizour saddle padköpçekleribizour saddle pads
you all'sköpçegigizyou all's saddle padköpçeklerigizyou all's saddle pads
theirköpçekleritheir saddle padköpçekleritheir saddle pads

The overlap in the last rows is real, not a mistake: köpçekleri can mean "his / her saddle pads", "their saddle pad", or "their saddle pads" — context decides.