köktaş

/køktaʃ/

(n.) copper sulfate, blue vitriol — In the past, people in the mountains used it as a dye. one source

köktaşnı boyaw ornuna hayırlanıb turğandıla — they used copper sulfate in place of dye
köktaş bla boyarğa — to dye with copper sulfate
köktaşnı eritirge — to dissolve copper sulfate
köktaşnı hayırlanırğa — to make use of copper sulfate

Cases and owners

Singular — cases of köktaş, plain and with an owner
Case	—plain	menimy	seniyour	anıhis / her	bizniour	sizniyou all's	alanıtheir
Nominative	köktaşthe sulfate	köktaşımmy sulfate	köktaşıŋyour sulfate	köktaşıhis sulfate	köktaşıbızour sulfate	köktaşığızyou all's sulfate	köktaşlarıtheir sulfates
Genitive	köktaşnıthe sulfate's	köktaşımımy sulfate's	köktaşıŋıyour sulfate's	köktaşınıhis sulfate's	köktaşıbıznıour sulfate's	köktaşığıznıyou all's sulfate's	köktaşlarınıtheir sulfates'
Accusative	köktaşnıthe sulfate (as the object)	köktaşımımy sulfate (as the object)	köktaşıŋıyour sulfate (as the object)	köktaşınhis sulfate (as the object)	köktaşıbıznıour sulfate (as the object)	köktaşığıznıyou all's sulfate (as the object)	köktaşlarıntheir sulfates (as the object)
Dative	köktaşhato the sulfate	köktaşımato my sulfate	köktaşıŋato your sulfate	köktaşınato his sulfate	köktaşıbızğato our sulfate	köktaşığızğato you all's sulfate	köktaşlarınato their sulfates
Locative	köktaşdain / at the sulfate	köktaşımdain / at my sulfate	köktaşıŋdain / at your sulfate	köktaşındain / at his sulfate	köktaşıbızdain / at our sulfate	köktaşığızdain / at you all's sulfate	köktaşlarındain / at their sulfates
Ablative	köktaşdanfrom the sulfate	köktaşımdanfrom my sulfate	köktaşıŋdanfrom your sulfate	köktaşındanfrom his sulfate	köktaşıbızdanfrom our sulfate	köktaşığızdanfrom you all's sulfate	köktaşlarındanfrom their sulfates

There is no plural of this word. The ending would attach like any other — it is the word, not the grammar, that refuses: this is not something Karachay counts.

The endings are the same ones the pronouns wear — that page explains when each case is used.