iyis

/ijis/

Cases

SingularPluralWhen to use it
nominativeiyisthe smelliyislethe smellsthe plain dictionary form — the doer of the sentence
genitiveiyisnithe smell'siyislenithe smells'the owner — whose it is
accusativeiyisnithe smell (as the object)iyislenithe smells (as the object)a specific, known object — whom or what
dativeiyisgeto the smelliyislegeto the smellsdirection or recipient — to where, to whom
locativeiyisdeat / in the smelliyisledeat / in the smellswhere it is; also having — mende bar, "I have it"
ablativeiyisdenfrom the smelliyisledenfrom the smellswhere 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
myiyisimmy smelliyislerimmy smells
youriyisingyour smelliyisleringyour smells
his / heriyisihis / her smelliyislerihis / her smells
ouriyisibizour smelliyisleribizour smells
you all'siyisigizyou all's smelliyislerigizyou all's smells
theiriyisleritheir smelliyisleritheir smells

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