Traditionally, adjectives are defined as words that describe nouns or pronouns.  When they describe nouns or pronouns, adjectives typically answer the following questions:

  What kind?             Which one?             How many?

For example, in the phrase

Tall is an adjective describing the noun man.

Tall answers the question "which man?" or "what kind of man?"

Similarly, in the phrase,

Easy is an adjective describing the noun assignment. 

Easy answers the question, "what kind of assignment?"

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Adjectives may also follow the noun they describe.

Example:

Finally, adjectives may follow a verb of being or a linking verb, thus completing the noun subject

            Examples

Like nouns, adjectives are often recognizable by their suffixes.

Endings such as  -ous   -ful  -ish  -able    usually designate adjectives.

Examples: 

Comparative and superlative forms

Single-syllable adjectives use -er and -est endings to designate comparative and superlative forms:

Examples:

Adjectives of two or more syllables use more and most for comparative and superlative forms.

Examples:

Note:

Two-syllable adjectives ending in -y may also use the -er / -est endings to designate comparative and superlative.

Examples:

To create negative comparative and superlative forms, use

less  for –er

and 

least for –est