sipi

/sipi/

Cases

SingularPluralWhen to use it
nominativesipithe osiersipilethe osiersthe plain dictionary form — the doer of the sentence
genitivesipinithe osier'ssipilenithe osiers'the owner — whose it is
accusativesipinithe osier (as the object)sipilenithe osiers (as the object)a specific, known object — whom or what
dativesipigeto the osiersipilegeto the osiersdirection or recipient — to where, to whom
locativesipideat / in the osiersipiledeat / in the osierswhere it is; also having — mende bar, "I have it"
ablativesipidenfrom the osiersipiledenfrom the osierswhere 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
mysipimmy osiersipilerimmy osiers
yoursipingyour osiersipileringyour osiers
his / hersipisihis / her osiersipilerihis / her osiers
oursipibizour osiersipileribizour osiers
you all'ssipigizyou all's osiersipilerigizyou all's osiers
theirsipileritheir osiersipileritheir osiers

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