dew

/ dew /

Cases

SingularPluralWhen to use it
nominative dew the giant dewle the giants the plain dictionary form — the doer of the sentence
genitive dewni the giant's dewleni the giants' the owner — whose it is
accusative dewni the giant (as the object) dewleni the giants (as the object) a specific, known object — whom or what
dative dewge to the giant dewlege to the giants direction or recipient — to where, to whom
locative dewde at / in the giant dewlede at / in the giants where it is; also having — mende bar, "I have it"
ablative dewden from the giant dewleden from the giants 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 dewim my giant dewlerim my giants
your dewiŋ your giant dewleriŋ your giants
his / her dewi his / her giant dewleri his / her giants
our dewibiz our giant dewleribiz our giants
you all's dewigiz you all's giant dewlerigiz you all's giants
their dewleri their giant dewleri their giants

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