muzey

/muzej/

Cases

SingularPluralWhen to use it
nominativemuzeythe museummuzeylethe museumsthe plain dictionary form — the doer of the sentence
genitivemuzeynithe museum'smuzeylenithe museums'the owner — whose it is
accusativemuzeynithe museum (as the object)muzeylenithe museums (as the object)a specific, known object — whom or what
dativemuzeygeto the museummuzeylegeto the museumsdirection or recipient — to where, to whom
locativemuzeydeat / in the museummuzeyledeat / in the museumswhere it is; also having — mende bar, "I have it"
ablativemuzeydenfrom the museummuzeyledenfrom the museumswhere 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
mymuzeyimmy museummuzeylerimmy museums
yourmuzeyingyour museummuzeyleringyour museums
his / hermuzeyihis / her museummuzeylerihis / her museums
ourmuzeyibizour museummuzeyleribizour museums
you all'smuzeyigizyou all's museummuzeylerigizyou all's museums
theirmuzeyleritheir museummuzeyleritheir museums

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