Adjectives.

Most adjectives will end in a consonant.

nemet - nice
noc - wrong, incorrect
tfot - tall
paanad - nice (of people exclusively)
teoht - tasty
eld - old

Some will end in a default -a.

ondirholdanda - interesting
enma - right, correct
fihna - cool, great, attractive
deona - short

These are the base forms that are used in the singular indefinite.

nemet odt, fihna vihdir (weather), eld mann, etc.

Plural adjectives almost always take an -a suffix.

nemeta
tfota
paanada
fihna (no change)
deona (no change)

A few adjectives will end in vowels.

lago - boring
ifne - glad
siufrihu - satisfied

These take -ë instead. When adjectives end in -e already, the two compress into just -ë.

lagoë, ifnë, siufrihuë, etc.

When the adjectives comes between dih and the noun, the -a or -ë is used.

dihë nemeta pocu - the nice people
dih ondirholdanda boc - the interesting book
dih tfota odt - the tall guy
dihë tfota edtu - the tall guys
dih elda mann - the old man
dihë siufrihuë pocu - the satisfied people

This is the same case with hiëra and daara.

hiëra ondirholdanda boc, daara deona poc, hiëra lagoë arbedt, etc.

The adjective öllu has its own rules; it's always used in the definite and always between the noun and an article or pronoun.

dih öllu podt, dih öllu tig, mhiya öllu böc, etc.
all the money, the whole day, all my books, etc.

[Note : genitive pronouns also take the -a with plural nouns.]

If another adjective is used, the -a suffix becomes -u and the -ë suffix remains the same.

dih öllu lagoë tig, dihë öllu fihnu cnohtu, etc.
the whole boring day, all the cute guys, etc.

Eos vihtem dihë öllu enmu sfaru.
We know all the right answers.

Ih hef dihë paanada pocim mhiy podt ëgafa.
I gave the nice people my money.

Dih mann fosde ifne, dhat heo niht sfiya öllu liofstu böc haadu ëmisda.
The man was glad that he hadn't lost all his favorite books.
[liofst - favorite, sfiy - (reflexive possessive, in this case "his own"), misa - to lose. Note the subjunctive mood in the subordinate clause.]