seyirsiniw

/ sejirsiniw /

Cases

SingularPluralWhen to use it
nominative seyirsiniw the being surprised seyirsiniwle the being surpriseds the plain dictionary form — the doer of the sentence
genitive seyirsiniwni the being surprised's seyirsiniwleni the being surpriseds' the owner — whose it is
accusative seyirsiniwni the being surprised (as the object) seyirsiniwleni the being surpriseds (as the object) a specific, known object — whom or what
dative seyirsiniwge to the being surprised seyirsiniwlege to the being surpriseds direction or recipient — to where, to whom
locative seyirsiniwde at / in the being surprised seyirsiniwlede at / in the being surpriseds where it is; also having — mende bar, "I have it"
ablative seyirsiniwden from the being surprised seyirsiniwleden from the being surpriseds 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
my seyirsiniwim my being surprised seyirsiniwlerim my being surpriseds
your seyirsiniwiŋ your being surprised seyirsiniwleriŋ your being surpriseds
his / her seyirsiniwi his / her being surprised seyirsiniwleri his / her being surpriseds
our seyirsiniwibiz our being surprised seyirsiniwleribiz our being surpriseds
you all's seyirsiniwigiz you all's being surprised seyirsiniwlerigiz you all's being surpriseds
their seyirsiniwleri their being surprised seyirsiniwleri their being surpriseds

The overlap in the last rows is real, not a mistake: seyirsiniwleri can mean "his / her being surpriseds", "their being surprised", or "their being surpriseds" — context decides.