seyf

/sejf/

Cases

SingularPluralWhen to use it
nominativeseyfthe safeseyflethe savesthe plain dictionary form — the doer of the sentence
genitiveseyfnithe safe'sseyflenithe saves'the owner — whose it is
accusativeseyfnithe safe (as the object)seyflenithe saves (as the object)a specific, known object — whom or what
dativeseyfgeto the safeseyflegeto the savesdirection or recipient — to where, to whom
locativeseyfdeat / in the safeseyfledeat / in the saveswhere it is; also having — mende bar, "I have it"
ablativeseyfdenfrom the safeseyfledenfrom the saveswhere 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
myseyfimmy safeseyflerimmy saves
yourseyfingyour safeseyfleringyour saves
his / herseyfihis / her safeseyflerihis / her saves
ourseyfibizour safeseyfleribizour saves
you all'sseyfigizyou all's safeseyflerigizyou all's saves
theirseyfleritheir safeseyfleritheir saves

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