Nouns.

Most nouns take these basic forms :

singular indefinite : a night - neoht
singular definite : the night - dih neoht
plural indefinite : nights - neohtu
plural definite : the nights - dihë neohtu

a world - aard
the world - dih aard
worlds - aardu
the worlds - dihë aardu

Some nouns take certain vowel changes :

a man - mann
the man - dih mann
men - menn
the men - dihë menn

a fork - fhorc
the fork - dih fhorc
forks - fhirc
the forks - dihë fhirc

a book - boc
the book - dih boc
books - böc
the books - dihë böc

These forms are consistent for the nominative and accusative cases, but the dative and genitive cases change slightly. Notice also that there is no indefinite article but instead just the noun on its own.

Dative :

night / nights - neohti / neohtim

world / worlds - aardi / aardim

man / men - manni / mennim

fork / forks - fhorci / fhircim

book / books - boci / böcim

Genitive :

night / nights - neohtë / neohtom

world / worlds - aardë / aardom

man / men - mannë / mennom

fork / forks - fhorcë / fhircom

book / books - bocë / böcom

So, most nouns will have six different forms : basic singular/plural (nom. and acc. cases), dative sing./pl., and genitive sing./pl. The article dih doesn't decline according to case, only to number.

Each noun's forms can be given as follows.

aard (-u, -i/-im, -ë/-om)

Example sentences :

I give the man (dat.) a book (acc.).
Ih giëf dih manni boc.

The men's books.
Dihë böc (nom.) dihë mennom (gen.).

You have a fork.
Dho heft fhorc (acc.).

We can see the books.
Eos kaanem dihë böc (acc.) siha.
[Note : the infinitive form of the verb follows auxiliary verbs.]

The books of the world.
Dihë böc (nom.) dih aardë (gen.).


[Vocabulary]

nouns
man - mann (menn, manni, mennim, mannë, mennom)
woman - mola (-u, -i/-im, -ë/-om)
boy - cnoht (-u, -i/-im, -ë/-om)
girl - cnir (-u, -i/-im, -ë/-om)
house - encaas (-u, -i/-im, -ë/-om)
job - arbedt (-u, -i/-im, -ë/-om)
city - stad (stedu, stadi/stedim, stadë/stedom)
money - podt (-u, -i/-im, -ë/-om)
day - tig (-u, -i/-im, -ë/-om)

adjectives
nice - nemet
fun - femir
good - geod
bad - sleoht
cold - kaal

[Plural adjectives end in -a. Watch for this.]

adverbs
now - niits
often - oftië

prepositions
in - op
with - met (dat.)

postpositions
out - uidh
without - saandir (dat.)
to, toward - tol

verbs
[Note : these all follow regular conjugation.]
to learn - liira
to live - liofa
to enjoy - njota (like arbeta)
to sing - meloda

additional
and - oc
but - mem
or - nef
both - baada
all - öllu
not - niht

Example sentences :

The woman's job is fun.
Dih arbedt dih molë'n femir.

A day in the city is nice.
Tig op dih stad ë nemet.

It's cold in the house.
Deo'n kaal in dih encaas.

The girl and the boy live often sang.
Dih cnir oc dih cnoht oftië melodta.

I lived in both cities.
Ih liofde op baada stedu.

All the books were good.
Dihë öllu böc fosa geoda.

We went to the city.
Eos eodem dih stad tol.

I have no money now.
Ih hef niht podt niits.
or
Niits hef ih niht podt.
or
Ih ë podti saandir niits.
[Literally, "I am without money now." More on this type of construction later.]

I've given the man the money.
Ih hef dih manni dih podt ëgafa.