körük

/køryk/

Cases

SingularPluralWhen to use it
nominativekörükthe bellowskörüklethe bellowsesthe plain dictionary form — the doer of the sentence
genitivekörüknüthe bellows'körüklenithe bellowses'the owner — whose it is
accusativekörüknüthe bellows (as the object)körüklenithe bellowses (as the object)a specific, known object — whom or what
dativekörükgeto the bellowskörüklegeto the bellowsesdirection or recipient — to where, to whom
locativekörükdeat / in the bellowskörükledeat / in the bellowseswhere it is; also having — mende bar, "I have it"
ablativekörükdenfrom the bellowskörükledenfrom the bellowseswhere 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
mykörügümmy bellowskörüklerimmy bellowses
yourkörügüngyour bellowskörükleringyour bellowses
his / herkörügühis / her bellowskörüklerihis / her bellowses
ourkörügübüzour bellowskörükleribizour bellowses
you all'skörügügüzyou all's bellowskörüklerigizyou all's bellowses
theirkörükleritheir bellowskörükleritheir bellowses

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