A noun is a person, place or thing; an adjective modifies or describes the noun. The girl is a beauty -- beauty being a noun. The girl can also be beautiful -- beautiful, in this case, being an adjective. Turning a noun into an adjective requires only a few minor changes to the ending of a word.
The simplest way to turn a noun into an adjective is to add suffixes to the end of the root word. The most common suffixes used to create adjectives are -ly, -able, -al, -ous, -ary, -ful, -ic, -ish, -less, -like and -y. For example, turn the noun "danger" into the adjective "dangerous" by adding the suffix -ous. Other examples include: "The lady enjoys magic; however, she is not very magical herself." "Those who have health are considered healthy, while those who follow fashion are thought of as fashionable." In these instances, the root nouns were turned into adjectives by adding appropriate suffixes.
Modifications to Make It Work
Sometimes you will have to make slight modifications to the root noun if it ends in -e, -y or -t. For example, if the noun is "offense," the adjective is "offensive." In this case, drop the -e from the noun and add -ive to create the adjective.