A proper adjective derives from a proper noun and modifies a common noun. A proper adjective is always capitalized.
Here are some examples of proper adjectives and the proper nouns from which they derive:
American – America
Chinese – China
European – Europe
Mexican – Mexico
Spanish – Spain
Roman – Rome
Norwegian – Norway
A woman from China is a Chinese woman.
The hat dance that originated in Mexico is the Mexican hat dance.
Coins from Rome are Roman coins.
The cruise ship from Norway is a Norwegian cruise ship.
Use a proper adjective to modify a common noun. A proper adjective is always capitalized because it derives from a proper noun.
It’s your turn. Find the proper adjective in this sentence: My parents took a European vacation last year. Did you figure it out? Good for you!