fenomen

/fenomen/

Cases

SingularPluralWhen to use it
nominativefenomenthe phenomenonfenomenlethe phenomenathe plain dictionary form — the doer of the sentence
genitivefenomennithe phenomenon'sfenomenlenithe phenomena'sthe owner — whose it is
accusativefenomennithe phenomenon (as the object)fenomenlenithe phenomena (as the object)a specific, known object — whom or what
dativefenomengeto the phenomenonfenomenlegeto the phenomenadirection or recipient — to where, to whom
locativefenomendeat / in the phenomenonfenomenledeat / in the phenomenawhere it is; also having — mende bar, "I have it"
ablativefenomendenfrom the phenomenonfenomenledenfrom the phenomenawhere 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
myfenomenimmy phenomenonfenomenlerimmy phenomena
yourfenomeningyour phenomenonfenomenleringyour phenomena
his / herfenomenihis / her phenomenonfenomenlerihis / her phenomena
ourfenomenibizour phenomenonfenomenleribizour phenomena
you all'sfenomenigizyou all's phenomenonfenomenlerigizyou all's phenomena
theirfenomenleritheir phenomenonfenomenleritheir phenomena

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