A proper adjective is a describing word made from a proper noun. Look at these examples of a proper noun that changes into a proper adjective:
America is a noun.
American is an adjective.
We hang an American flag in front of our house every summer.
American modifies the noun flag.
Japan is a noun.
Japanese is an adjective.
Sandra wears a Japanese kimono on her birthday.
Japanese modifies the noun kimono.
Here are more proper nouns that turn into proper adjectives:
Germany – German
Spain – Spanish
China – Chinese
Mexico – Mexican
Canada – Canadian
A proper noun can be changed to a proper adjective. Always capitalize a proper adjective.
▶It’s your turn. Find the proper adjective in this sentence: We studied the French language when we were in Europe. Did you find the word that describes a noun? Good for you!