An adjective is a word that modifies, or describes, a noun or a pronoun.
Adjectives give more information about a noun.
They can tell you how many (some bugs, seven bugs) or what kind (long bug, green bug).
An adjective can tell you what someone or something looks like (gigantic ), feels like (sticky), or acts like (friendly ).
An adjective can describe any quality of the noun it modifies.
Lots of adjectives have common endings. Many end in the letter y (pretty, happy, greedy). Sometimes you can make an adjective out of a noun or a verb by adding an ending such as -ic, -ous, -ish, -ful, -ing, -al, -or -able. For instance, someone who acts like a fool might be described as foolish.
Sometimes a word that looks like a noun is really an adjective. For instance, a tagalong is someone who follows someone else. But in the phrase tagalong bug, the word tagalong describes the bug. That makes it an adjective. Other examples of adjectives “disguised” as nouns are chocolate soda and kitchen sink.