Adjective classes

Wistrish adjective classes are less numerous than the noun ones:

Regular classes

There is also a mixed a-īn-stem adjectival class: it declines identically to a-stem adjectives, with the exception of feminine weak forms: these decline identically to feminine īn-stem nouns.

Infixed classes

Basically a-stem class with an infix.

Weak classes

Weak classes only have weak forms, which are used regardless of the definitiveness of the modified noun.