{{ExamplesSidebar|35%|
 I like blue skies and fluffy clouds.
 He is a nice man.
 It was a ''very 'cold day.
 My friend is very tall with brown eyes
 They are good people.}}

An adjective is a word that describes a noun or pronoun.  Nouns are words that name a place, a person, a thing, or an idea. An adjective is a word that gives more information about the noun that goes with it. It is a part of speech. 

Often, the adjective is before the noun it describes.  Sometimes an adjective is not followed by a noun:
 The sky is blue. The joke she told was so funny, I could not stop laughing all day.

 It is still an adjective, because we could have "the blue sky", "the funny joke", and "the crazy man". The adjective is still describing the noun though they are not side by side.
 There is a tall man.
An adjective is a word that gives instant information about a noun to make a clear picture of the noun in the mind of the reader and create a feeling  to the writer.

 Comparative and superlative 
Sometimes there are different forms of the same adjective. If one joke makes a person laugh more than another joke, then that joke is funnier. This is called the comparative form.  The day that is colder than any other is the coldest day. This is the superlative form of "cold". Some adjectives need additional words when we want to compare them. For instance, one car may be cheaper than another, but the second car may be more reliable (we use "more reliable", instead of "reliabler"). Reliable means worthy of trust.

The rule is:

For short adjectives ending in a consonant like "cold," "black," or "fast," one adds the suffix er to make a comparison of greater magnitude. Example: "The North Pole is colder than Florida." The greatest possible comparison is made by adding the suffix est. Example: "The North Pole is the coldest place on the Earth." For long adjectives like intelligent, conscientious, comprehensive, one uses the word more to make a comparison of greater magnitude. Example: "Children are more intelligent than adults." 

A superlative makes the greatest possible comparison.  One uses the word most. Example: "She is the most conscientious person I have ever known."

 Nouns as noun modifiers 

In the English language, it is possible for a noun to modify (describe) another noun. Example: take the noun "angel" and the noun "face." Put them together and the result is "angel face." The first noun is acting as an adjective, because it is giving us information about the second noun.

 Adjectives and adverbs 
Adjectives are words we use to describe the noun.  Simple words like "warm" and "fat" are adjectives commonly used in writing.  One can make adverbs from some adjectives by adding the suffix ly'''.  Example: take the adjective "beautiful," the adverb is beautifully.  One can do it the other way around: take an adverb like "presumably," the adjective is "presumable".  "Presumable innocence" means the accused is assumed to be innocent until proven guilty.

The adjective "guilty" becomes the adverb "guiltily" and vice versa (the opposite), the adverb "guiltily" becomes the adjective "guilty."

100 Adjectives used in Basic English 
able • acid • angry • automatic • beautiful • black • boiling • bright • broken • brown • cheap • chemical • chief • clean • clear • common • complex • conscious • cut • deep • dependent • early • elastic • electric • equal • fat • fertile • first • fixed • flat • free • frequent • full • general • good • great • gray • hanging • happy • hard • healthy • high • hollow • important • kind • like • living • long • male • married • material • medical • military • natural • necessary • new • normal • open • parallel • past • physical • political • poor • possible • present • private • probable • quick • quiet • ready • red • regular • responsible • right • round • same • second • separate • serious • sharp • smooth • sticky • stiff • straight • strong • sudden • sweet • tall • thick • tight • tired • true • violent  • warm • wet • wide • wise • yellow • young

Other websites

Adjectives
Adjective1.com

Parts of speech