kiriş

/ kiriʃ /

Cases

SingularPluralWhen to use it
nominative kiriş the ridge kirişle the ridges the plain dictionary form — the doer of the sentence
genitive kirişni the ridge's kirişleni the ridges' the owner — whose it is
accusative kirişni the ridge (as the object) kirişleni the ridges (as the object) a specific, known object — whom or what
dative kirişge to the ridge kirişlege to the ridges direction or recipient — to where, to whom
locative kirişde at / in the ridge kirişlede at / in the ridges where it is; also having — mende bar, "I have it"
ablative kirişden from the ridge kirişleden from the ridges 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 kirişim my ridge kirişlerim my ridges
your kirişiŋ your ridge kirişleriŋ your ridges
his / her kirişi his / her ridge kirişleri his / her ridges
our kirişibiz our ridge kirişleribiz our ridges
you all's kirişigiz you all's ridge kirişlerigiz you all's ridges
their kirişleri their ridge kirişleri their ridges

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