sanatoriy

/sanatorij/

Cases

SingularPluralWhen to use it
nominativesanatoriythe sanatoriumsanatoriylethe sanatoriumsthe plain dictionary form — the doer of the sentence
genitivesanatoriynithe sanatorium'ssanatoriylenithe sanatoriums'the owner — whose it is
accusativesanatoriynithe sanatorium (as the object)sanatoriylenithe sanatoriums (as the object)a specific, known object — whom or what
dativesanatoriygeto the sanatoriumsanatoriylegeto the sanatoriumsdirection or recipient — to where, to whom
locativesanatoriydeat / in the sanatoriumsanatoriyledeat / in the sanatoriumswhere it is; also having — mende bar, "I have it"
ablativesanatoriydenfrom the sanatoriumsanatoriyledenfrom the sanatoriumswhere 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
mysanatoriyimmy sanatoriumsanatoriylerimmy sanatoriums
yoursanatoriyingyour sanatoriumsanatoriyleringyour sanatoriums
his / hersanatoriyihis / her sanatoriumsanatoriylerihis / her sanatoriums
oursanatoriyibizour sanatoriumsanatoriyleribizour sanatoriums
you all'ssanatoriyigizyou all's sanatoriumsanatoriylerigizyou all's sanatoriums
theirsanatoriyleritheir sanatoriumsanatoriyleritheir sanatoriums

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