This is the 57th most frequent Hungarian word.
amerikai
"Amerikai" means "American" in English.
The word 'amerikai' here is used as an adjective to describe the noun 'students', indicating their nationality.
Az amerikai diákok szorgalmasak.
The American students are diligent.
The word 'amerikai' is used as an adjective to describe the movies, specifying their origin to be from America.
Amerikai filmeket néztünk tegnap.
We watched American movies yesterday.
Here, the word 'amerikai' functions as a noun to specify the person's nationality, indicating that they are from America.