This is the 8770th most frequent Portuguese word.
analfabeto
Illiterate; unable to read or write.
Here, 'analfabeto' is used as an adjective to describe someone who lacks the ability to read and write.
Ele é analfabeto e não consegue ler ou escrever.
He is illiterate and cannot read or write.
In this sentence, 'analfabetas' is used as an adjective in its plural form describing the large number of people without literacy skills.
No Brasil, ainda há milhões de pessoas analfabetas.
In Brazil, there are still millions of illiterate people.
Here, 'analfabeto' functions as a noun referring to the condition or attribute of illiteracy.