qayın

/ qajɯn /

Definitions noun birch, birch tree

Definitions noun birch- (attributive)

Definitions noun in-law

Definitions noun brother-in-law, husband's brother, wife's brother

Cases

	Singular	Plural	When to use it
nominative	qayın the birch	qayınla the birches	the plain dictionary form — the doer of the sentence
genitive	qayınnı the birch's	qayınlanı the birches'	the owner — whose it is
accusative	qayınnı the birch (as the object)	qayınlanı the birches (as the object)	a specific, known object — whom or what
dative	qayınğa to the birch	qayınlağa to the birches	direction or recipient — to where, to whom
locative	qayında at / in the birch	qayınlada at / in the birches	where it is; also having — mende bar, "I have it"
ablative	qayından from the birch	qayınladan from the birches	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.

	One owned	Several owned
my	qayınım my birch	qayınlarım my birches
your	qayınıŋ your birch	qayınlarıŋ your birches
his / her	qayını his / her birch	qayınları his / her birches
our	qayınıbız our birch	qayınlarıbız our birches
you all's	qayınığız you all's birch	qayınlarığız you all's birches
their	qayınları their birch	qayınları their birches

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