bilek

/ bilek /

Cases

SingularPluralWhen to use it
nominative bilek the arm bilekle the arms the plain dictionary form — the doer of the sentence
genitive bilekni the arm's bilekleni the arms' the owner — whose it is
accusative bilekni the arm (as the object) bilekleni the arms (as the object) a specific, known object — whom or what
dative bilekge to the arm bileklege to the arms direction or recipient — to where, to whom
locative bilekde at / in the arm bileklede at / in the arms where it is; also having — mende bar, "I have it"
ablative bilekden from the arm bilekleden from the arms 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 bilegim my arm bileklerim my arms
your bilegiŋ your arm bilekleriŋ your arms
his / her bilegi his / her arm bilekleri his / her arms
our bilegibiz our arm bilekleribiz our arms
you all's bilegigiz you all's arm bileklerigiz you all's arms
their bilekleri their arm bilekleri their arms

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