kater

/kater/

Cases

SingularPluralWhen to use it
nominativekaterthe motor launchkaterlethe motor launchesthe plain dictionary form — the doer of the sentence
genitivekaternithe motor launch'skaterlenithe motor launches'the owner — whose it is
accusativekaternithe motor launch (as the object)katerlenithe motor launches (as the object)a specific, known object — whom or what
dativekatergeto the motor launchkaterlegeto the motor launchesdirection or recipient — to where, to whom
locativekaterdeat / in the motor launchkaterledeat / in the motor launcheswhere it is; also having — mende bar, "I have it"
ablativekaterdenfrom the motor launchkaterledenfrom the motor launcheswhere 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
mykaterimmy motor launchkaterlerimmy motor launches
yourkateringyour motor launchkaterleringyour motor launches
his / herkaterihis / her motor launchkaterlerihis / her motor launches
ourkateribizour motor launchkaterleribizour motor launches
you all'skaterigizyou all's motor launchkaterlerigizyou all's motor launches
theirkaterleritheir motor launchkaterleritheir motor launches

The overlap in the last rows is real, not a mistake: katerleri can mean "his / her motor launches", "their motor launch", or "their motor launches" — context decides.