süek

/ syek /

Cases

SingularPluralWhen to use it
nominative süek the bone süekle the bones the plain dictionary form — the doer of the sentence
genitive süekni the bone's süekleni the bones' the owner — whose it is
accusative süekni the bone (as the object) süekleni the bones (as the object) a specific, known object — whom or what
dative süekge to the bone süeklege to the bones direction or recipient — to where, to whom
locative süekde at / in the bone süeklede at / in the bones where it is; also having — mende bar, "I have it"
ablative süekden from the bone süekleden from the bones 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
my süegim my bone süeklerim my bones
your süeging your bone süeklering your bones
his / her süegi his / her bone süekleri his / her bones
our süegibiz our bone süekleribiz our bones
you all's süegigiz you all's bone süeklerigiz you all's bones
their süekleri their bone süekleri their bones

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