This is the 230th most frequent Spanish word.
unas
"Unas" means "some" or "a few" in English, used with feminine plural nouns.
Here, 'unas' is employed as an indefinite pronoun meaning 'some,' referring to an unspecified subset (feminine plural) of the group 'de las mejores películas.'
Estas son unas de las mejores películas que he visto.
These are some of the best movies I've ever seen.
In this context, 'uñas' refers to 'nails,' and is not related to the indefinite article 'unas.' This showcases the versatility of the word based on context.
He pintado mis uñas de rojo.
I painted my nails red.
In this sentence, 'unas' is used as an indefinite article in its feminine plural form to indicate an unspecified quantity of the feminine plural noun 'manzanas' (apples).