tırnaq

/tɯrnaq/

Cases

SingularPluralWhen to use it
nominativetırnaqthe fingernailtırnaqlathe fingernailsthe plain dictionary form — the doer of the sentence
genitivetırnaqnıthe fingernail'stırnaqlanıthe fingernails'the owner — whose it is
accusativetırnaqnıthe fingernail (as the object)tırnaqlanıthe fingernails (as the object)a specific, known object — whom or what
dativetırnaqğato the fingernailtırnaqlağato the fingernailsdirection or recipient — to where, to whom
locativetırnaqdaat / in the fingernailtırnaqladaat / in the fingernailswhere it is; also having — mende bar, "I have it"
ablativetırnaqdanfrom the fingernailtırnaqladanfrom the fingernailswhere 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
mytırnağımmy fingernailtırnaqlarımmy fingernails
yourtırnağıngyour fingernailtırnaqlarıngyour fingernails
his / hertırnağıhis / her fingernailtırnaqlarıhis / her fingernails
ourtırnağıbızour fingernailtırnaqlarıbızour fingernails
you all'stırnağığızyou all's fingernailtırnaqlarığızyou all's fingernails
theirtırnaqlarıtheir fingernailtırnaqlarıtheir fingernails

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