yaçeyka

/jatʃejka/

Cases

SingularPluralWhen to use it
nominativeyaçeykathe cellyaçeykalathe cellsthe plain dictionary form — the doer of the sentence
genitiveyaçeykanıthe cell'syaçeykalanıthe cells'the owner — whose it is
accusativeyaçeykanıthe cell (as the object)yaçeykalanıthe cells (as the object)a specific, known object — whom or what
dativeyaçeykağato the cellyaçeykalağato the cellsdirection or recipient — to where, to whom
locativeyaçeykadaat / in the cellyaçeykaladaat / in the cellswhere it is; also having — mende bar, "I have it"
ablativeyaçeykadanfrom the cellyaçeykaladanfrom the cellswhere 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
myyaçeykammy cellyaçeykalarımmy cells
youryaçeykangyour cellyaçeykalarıngyour cells
his / heryaçeykasıhis / her cellyaçeykalarıhis / her cells
ouryaçeykabızour cellyaçeykalarıbızour cells
you all'syaçeykağızyou all's cellyaçeykalarığızyou all's cells
theiryaçeykalarıtheir cellyaçeykalarıtheir cells

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