dekret

/dekret/

Cases

SingularPluralWhen to use it
nominativedekretthe decreedekretlethe decreesthe plain dictionary form — the doer of the sentence
genitivedekretnithe decree'sdekretlenithe decrees'the owner — whose it is
accusativedekretnithe decree (as the object)dekretlenithe decrees (as the object)a specific, known object — whom or what
dativedekretgeto the decreedekretlegeto the decreesdirection or recipient — to where, to whom
locativedekretdeat / in the decreedekretledeat / in the decreeswhere it is; also having — mende bar, "I have it"
ablativedekretdenfrom the decreedekretledenfrom the decreeswhere 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
mydekretimmy decreedekretlerimmy decrees
yourdekretingyour decreedekretleringyour decrees
his / herdekretihis / her decreedekretlerihis / her decrees
ourdekretibizour decreedekretleribizour decrees
you all'sdekretigizyou all's decreedekretlerigizyou all's decrees
theirdekretleritheir decreedekretleritheir decrees

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