cel

/ dʒel /

Cases

SingularPluralWhen to use it
nominative cel the wind celle the winds the plain dictionary form — the doer of the sentence
genitive celni the wind's celleni the winds' the owner — whose it is
accusative celni the wind (as the object) celleni the winds (as the object) a specific, known object — whom or what
dative celge to the wind cellege to the winds direction or recipient — to where, to whom
locative celde at / in the wind cellede at / in the winds where it is; also having — mende bar, "I have it"
ablative celden from the wind celleden from the winds 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 celim my wind cellerim my winds
your celing your wind cellering your winds
his / her celi his / her wind celleri his / her winds
our celibiz our wind celleribiz our winds
you all's celigiz you all's wind cellerigiz you all's winds
their celleri their wind celleri their winds

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