kaş

/ qaʃ /

Cases

SingularPluralWhen to use it
nominative kaş the eyebrow kaşla the eyebrows the plain dictionary form — the doer of the sentence
genitive kaşnı the eyebrow's kaşlanı the eyebrows' the owner — whose it is
accusative kaşnı the eyebrow (as the object) kaşlanı the eyebrows (as the object) a specific, known object — whom or what
dative kaşha to the eyebrow kaşlağa to the eyebrows direction or recipient — to where, to whom
locative kaşda at / in the eyebrow kaşlada at / in the eyebrows where it is; also having — mende bar, "I have it"
ablative kaşdan from the eyebrow kaşladan from the eyebrows 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 kaşım my eyebrow kaşlarım my eyebrows
your kaşıng your eyebrow kaşlarıng your eyebrows
his / her kaşı his / her eyebrow kaşları his / her eyebrows
our kaşıbız our eyebrow kaşlarıbız our eyebrows
you all's kaşığız you all's eyebrow kaşlarığız you all's eyebrows
their kaşları their eyebrow kaşları their eyebrows

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