efir

/efir/

Cases

SingularPluralWhen to use it
nominativeefirthe airefirlethe airsthe plain dictionary form — the doer of the sentence
genitiveefirnithe air'sefirlenithe airs'the owner — whose it is
accusativeefirnithe air (as the object)efirlenithe airs (as the object)a specific, known object — whom or what
dativeefirgeto the airefirlegeto the airsdirection or recipient — to where, to whom
locativeefirdeat / in the airefirledeat / in the airswhere it is; also having — mende bar, "I have it"
ablativeefirdenfrom the airefirledenfrom the airswhere 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
myefirimmy airefirlerimmy airs
yourefiringyour airefirleringyour airs
his / herefirihis / her airefirlerihis / her airs
ourefiribizour airefirleribizour airs
you all'sefirigizyou all's airefirlerigizyou all's airs
theirefirleritheir airefirleritheir airs

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