semen

/semen/

Cases

SingularPluralWhen to use it
nominativesementhe tribute collectorsemenlethe tribute collectorsthe plain dictionary form — the doer of the sentence
genitivesemennithe tribute collector'ssemenlenithe tribute collectors'the owner — whose it is
accusativesemennithe tribute collector (as the object)semenlenithe tribute collectors (as the object)a specific, known object — whom or what
dativesemengeto the tribute collectorsemenlegeto the tribute collectorsdirection or recipient — to where, to whom
locativesemendeat / in the tribute collectorsemenledeat / in the tribute collectorswhere it is; also having — mende bar, "I have it"
ablativesemendenfrom the tribute collectorsemenledenfrom the tribute collectorswhere 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
mysemenimmy tribute collectorsemenlerimmy tribute collectors
yoursemeningyour tribute collectorsemenleringyour tribute collectors
his / hersemenihis / her tribute collectorsemenlerihis / her tribute collectors
oursemenibizour tribute collectorsemenleribizour tribute collectors
you all'ssemenigizyou all's tribute collectorsemenlerigizyou all's tribute collectors
theirsemenleritheir tribute collectorsemenleritheir tribute collectors

The overlap in the last rows is real, not a mistake: semenleri can mean "his / her tribute collectors", "their tribute collector", or "their tribute collectors" — context decides.