sekret

/sekret/

Cases

SingularPluralWhen to use it
nominativesekretthe secretsekretlethe secretsthe plain dictionary form — the doer of the sentence
genitivesekretnithe secret'ssekretlenithe secrets'the owner — whose it is
accusativesekretnithe secret (as the object)sekretlenithe secrets (as the object)a specific, known object — whom or what
dativesekretgeto the secretsekretlegeto the secretsdirection or recipient — to where, to whom
locativesekretdeat / in the secretsekretledeat / in the secretswhere it is; also having — mende bar, "I have it"
ablativesekretdenfrom the secretsekretledenfrom the secretswhere 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
mysekretimmy secretsekretlerimmy secrets
yoursekretingyour secretsekretleringyour secrets
his / hersekretihis / her secretsekretlerihis / her secrets
oursekretibizour secretsekretleribizour secrets
you all'ssekretigizyou all's secretsekretlerigizyou all's secrets
theirsekretleritheir secretsekretleritheir secrets

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