güh

/ɡyx/

Cases

SingularPluralWhen to use it
nominativegühthe mortargühlethe mortarsthe plain dictionary form — the doer of the sentence
genitivegühnüthe mortar'sgühlenithe mortars'the owner — whose it is
accusativegühnüthe mortar (as the object)gühlenithe mortars (as the object)a specific, known object — whom or what
dativegühgeto the mortargühlegeto the mortarsdirection or recipient — to where, to whom
locativegühdeat / in the mortargühledeat / in the mortarswhere it is; also having — mende bar, "I have it"
ablativegühdenfrom the mortargühledenfrom the mortarswhere 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
mygühümmy mortargühlerimmy mortars
yourgühüngyour mortargühleringyour mortars
his / hergühühis / her mortargühlerihis / her mortars
ourgühübüzour mortargühleribizour mortars
you all'sgühügüzyou all's mortargühlerigizyou all's mortars
theirgühleritheir mortargühleritheir mortars

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