Athenian is a proper adjective for Athens.
No, old is not a proper adjective. A proper adjective is an adjective derived from a proper noun, such as Swiss cheese, Bolivian pottery, Chinese silk, etc.
Egyptian is a proper adjective.
Persian
No, Egyptian is an adjective used to describe something of or from Egypt (a proper noun). Although Egyptian is an adjective, it is still capitalized.
The word Egyptian is a proper noun as a word for a person of or from the country of Egypt. The word Egyptian is also a proper adjective that describes a noun as of or from the country of Egypt.
no because it doesn't describe a specific person, place, or thing
The proper adjective for Portuguese is "Portuguese."
The proper adjective for southwest is "southwestern."
The proper adjective for Haiti is Haitian.
Vietnamese is the proper adjective for Vietnam.
The proper adjective for Siam is Siamese.
The proper adjective for George is Georgian.
The proper adjective for Georgia is Georgian.
The proper adjective for Mayan is "Mayan."
Freudian is the proper adjective for Freud.
No, old is not a proper adjective. A proper adjective is an adjective derived from a proper noun, such as Swiss cheese, Bolivian pottery, Chinese silk, etc.
France is always a proper noun it is never a proper adjective (what is a proper adjective? The adjective is french. I like french food