Ylysepen features 3 classes of nouns based upon size of the object.
The first class is the is class. Is objects are small enough to be held or carried in the hand. Is also refers to intangible nouns.
Is gelker - the flower
Is cenel - the bone
Is ruc - the light
Is turns to dem in the plural
Dem gilker - the flowers
Dem cinel - the bones
Dem ryci - the lights
The second class is the i class. I things are those which are roughly the same size of a human. They may or may not be transportable by a human, but they generally are not permanent.
I ymer - the man
I nelo̧tef - the chair
I also turns to dem in the plural
Dem ymer - the men
Dem nilo̧lef - the chairs
The third class, ilos refers to large, usually permanent objects.
Ilos kes - the house
Ilos turns to ilem in the plural.
Ilem kisi - the houses.