halger

/xalɡer/

Cases

SingularPluralWhen to use it
nominativehalgerthe old knifehalgerlethe old knivesthe plain dictionary form — the doer of the sentence
genitivehalgernithe old knife'shalgerlenithe old knives'the owner — whose it is
accusativehalgernithe old knife (as the object)halgerlenithe old knives (as the object)a specific, known object — whom or what
dativehalgergeto the old knifehalgerlegeto the old knivesdirection or recipient — to where, to whom
locativehalgerdeat / in the old knifehalgerledeat / in the old kniveswhere it is; also having — mende bar, "I have it"
ablativehalgerdenfrom the old knifehalgerledenfrom the old kniveswhere 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
myhalgerimmy old knifehalgerlerimmy old knives
yourhalgeringyour old knifehalgerleringyour old knives
his / herhalgerihis / her old knifehalgerlerihis / her old knives
ourhalgeribizour old knifehalgerleribizour old knives
you all'shalgerigizyou all's old knifehalgerlerigizyou all's old knives
theirhalgerleritheir old knifehalgerleritheir old knives

The overlap in the last rows is real, not a mistake: halgerleri can mean "his / her old knives", "their old knife", or "their old knives" — context decides.