çüy

/tʃyj/

Cases

SingularPluralWhen to use it
nominativeçüythe nailçüylethe nailsthe plain dictionary form — the doer of the sentence
genitiveçüynüthe nail'sçüylenithe nails'the owner — whose it is
accusativeçüynüthe nail (as the object)çüylenithe nails (as the object)a specific, known object — whom or what
dativeçüygeto the nailçüylegeto the nailsdirection or recipient — to where, to whom
locativeçüydeat / in the nailçüyledeat / in the nailswhere it is; also having — mende bar, "I have it"
ablativeçüydenfrom the nailçüyledenfrom the nailswhere 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
myçüyümmy nailçüylerimmy nails
yourçüyüngyour nailçüyleringyour nails
his / herçüyühis / her nailçüylerihis / her nails
ourçüyübüzour nailçüyleribizour nails
you all'sçüyügüzyou all's nailçüylerigizyou all's nails
theirçüyleritheir nailçüyleritheir nails

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