materiya

/materija/

Cases

SingularPluralWhen to use it
nominativemateriyathe mattermateriyalathe mattersthe plain dictionary form — the doer of the sentence
genitivemateriyanıthe matter'smateriyalanıthe matters'the owner — whose it is
accusativemateriyanıthe matter (as the object)materiyalanıthe matters (as the object)a specific, known object — whom or what
dativemateriyağato the mattermateriyalağato the mattersdirection or recipient — to where, to whom
locativemateriyadaat / in the mattermateriyaladaat / in the matterswhere it is; also having — mende bar, "I have it"
ablativemateriyadanfrom the mattermateriyaladanfrom the matterswhere 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
mymateriyammy mattermateriyalarımmy matters
yourmateriyangyour mattermateriyalarıngyour matters
his / hermateriyasıhis / her mattermateriyalarıhis / her matters
ourmateriyabızour mattermateriyalarıbızour matters
you all'smateriyağızyou all's mattermateriyalarığızyou all's matters
theirmateriyalarıtheir mattermateriyalarıtheir matters

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