kök

/køk/

As a noun

Cases

SingularPluralWhen to use it
nominativekökthe skyköklethe skiesthe plain dictionary form — the doer of the sentence
genitiveköknüthe sky'sköklenithe skies'the owner — whose it is
accusativeköknüthe sky (as the object)köklenithe skies (as the object)a specific, known object — whom or what
dativekökgeto the skyköklegeto the skiesdirection or recipient — to where, to whom
locativekökdeat / in the skykökledeat / in the skieswhere it is; also having — mende bar, "I have it"
ablativekökdenfrom the skykökledenfrom the skieswhere 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
mykögümmy skyköklerimmy skies
yourkögüngyour skykökleringyour skies
his / herkögühis / her skyköklerihis / her skies
ourkögübüzour skykökleribizour skies
you all'skögügüzyou all's skyköklerigizyou all's skies
theirkökleritheir skykökleritheir skies

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

As an adjective

Degrees

base formkökblue
comparative — morekögürekbluer
intensifier — verybek kökvery blue
superlative — mostem kökthe bluest

Saying it about something

One thingSeveral
this / thesebu kökdüthis is bluebıla kökdülethese are blue
that / thoseol kökdüthat / it is blueala kökdülethose / they are blue
minemeniki kökdümine is bluemenikile kökdülemine are blue
yoursseniki kökdüyours is bluesenikile kökdüleyours are blue
oursbizniki kökdüours is bluebiznikile kökdüleours are blue