klüç

/klytʃ/

Cases

SingularPluralWhen to use it
nominativeklüçthe clefklüçlethe clefsthe plain dictionary form — the doer of the sentence
genitiveklüçnüthe clef'sklüçlenithe clefs'the owner — whose it is
accusativeklüçnüthe clef (as the object)klüçlenithe clefs (as the object)a specific, known object — whom or what
dativeklüçgeto the clefklüçlegeto the clefsdirection or recipient — to where, to whom
locativeklüçdeat / in the clefklüçledeat / in the clefswhere it is; also having — mende bar, "I have it"
ablativeklüçdenfrom the clefklüçledenfrom the clefswhere 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
myklüçümmy clefklüçlerimmy clefs
yourklüçüngyour clefklüçleringyour clefs
his / herklüçühis / her clefklüçlerihis / her clefs
ourklüçübüzour clefklüçleribizour clefs
you all'sklüçügüzyou all's clefklüçlerigizyou all's clefs
theirklüçleritheir clefklüçleritheir clefs

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