kassir

/kassir/

Cases

SingularPluralWhen to use it
nominativekassirthe cashierkassirlethe cashiersthe plain dictionary form — the doer of the sentence
genitivekassirnithe cashier'skassirlenithe cashiers'the owner — whose it is
accusativekassirnithe cashier (as the object)kassirlenithe cashiers (as the object)a specific, known object — whom or what
dativekassirgeto the cashierkassirlegeto the cashiersdirection or recipient — to where, to whom
locativekassirdeat / in the cashierkassirledeat / in the cashierswhere it is; also having — mende bar, "I have it"
ablativekassirdenfrom the cashierkassirledenfrom the cashierswhere 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
mykassirimmy cashierkassirlerimmy cashiers
yourkassiringyour cashierkassirleringyour cashiers
his / herkassirihis / her cashierkassirlerihis / her cashiers
ourkassiribizour cashierkassirleribizour cashiers
you all'skassirigizyou all's cashierkassirlerigizyou all's cashiers
theirkassirleritheir cashierkassirleritheir cashiers

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