basseyn

/bassejn/

Cases

SingularPluralWhen to use it
nominativebasseynthe swimming poolbasseynlethe swimming poolsthe plain dictionary form — the doer of the sentence
genitivebasseynnithe swimming pool'sbasseynlenithe swimming pools'the owner — whose it is
accusativebasseynnithe swimming pool (as the object)basseynlenithe swimming pools (as the object)a specific, known object — whom or what
dativebasseyngeto the swimming poolbasseynlegeto the swimming poolsdirection or recipient — to where, to whom
locativebasseyndeat / in the swimming poolbasseynledeat / in the swimming poolswhere it is; also having — mende bar, "I have it"
ablativebasseyndenfrom the swimming poolbasseynledenfrom the swimming poolswhere 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
mybasseynimmy swimming poolbasseynlerimmy swimming pools
yourbasseyningyour swimming poolbasseynleringyour swimming pools
his / herbasseynihis / her swimming poolbasseynlerihis / her swimming pools
ourbasseynibizour swimming poolbasseynleribizour swimming pools
you all'sbasseynigizyou all's swimming poolbasseynlerigizyou all's swimming pools
theirbasseynleritheir swimming poolbasseynleritheir swimming pools

The overlap in the last rows is real, not a mistake: basseynleri can mean "his / her swimming pools", "their swimming pool", or "their swimming pools" — context decides.