gelew

/ɡelew/

Cases

SingularPluralWhen to use it
nominativegelewthe fescuegelewlethe fescuesthe plain dictionary form — the doer of the sentence
genitivegelewnithe fescue'sgelewlenithe fescues'the owner — whose it is
accusativegelewnithe fescue (as the object)gelewlenithe fescues (as the object)a specific, known object — whom or what
dativegelewgeto the fescuegelewlegeto the fescuesdirection or recipient — to where, to whom
locativegelewdeat / in the fescuegelewledeat / in the fescueswhere it is; also having — mende bar, "I have it"
ablativegelewdenfrom the fescuegelewledenfrom the fescueswhere 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
mygelewimmy fescuegelewlerimmy fescues
yourgelewingyour fescuegelewleringyour fescues
his / hergelewihis / her fescuegelewlerihis / her fescues
ourgelewibizour fescuegelewleribizour fescues
you all'sgelewigizyou all's fescuegelewlerigizyou all's fescues
theirgelewleritheir fescuegelewleritheir fescues

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