Adjectives and Adverbs

They may describe inherent properties of the entity (colour, size, weight, age or quality)

They may also describe properties that classify or define the entity in relatin to others (e.g. environmental in the phrase [environmental factors] defines the factors as related to the environment)

They follow an order when two or more are used in a phrase (1. subjective judgement or evaluation -ugly/good; 2. measurement -old; 3. colour -yellow; 4. a noun acting as an adjective describing the material -tin [an ugly, old, yellow tin bucket]. Changing this order produces phrases not acepted by native speakers

Attributive adjectives: modifying the head noun in a NP [a big car]

Predicative adjectives: appearing after a verb and not in a NP, they may describe the subject or the object [She is insane.] [You have your priorities wrong.]

There are some adjectives that are purely used attributively and others that are used purely predicatively.