effekt

/effekt/

Cases

SingularPluralWhen to use it
nominativeeffektthe effecteffektlethe effectsthe plain dictionary form — the doer of the sentence
genitiveeffektnithe effect'seffektlenithe effects'the owner — whose it is
accusativeeffektnithe effect (as the object)effektlenithe effects (as the object)a specific, known object — whom or what
dativeeffektgeto the effecteffektlegeto the effectsdirection or recipient — to where, to whom
locativeeffektdeat / in the effecteffektledeat / in the effectswhere it is; also having — mende bar, "I have it"
ablativeeffektdenfrom the effecteffektledenfrom the effectswhere 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
myeffektimmy effecteffektlerimmy effects
youreffektingyour effecteffektleringyour effects
his / hereffektihis / her effecteffektlerihis / her effects
oureffektibizour effecteffektleribizour effects
you all'seffektigizyou all's effecteffektlerigizyou all's effects
theireffektleritheir effecteffektleritheir effects

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