Here are some other ways to describe something that can't read or write:
* Non-literate: This is a more formal term than "illiterate".
* Uneducated: This implies a lack of formal education, which often includes the ability to read and write.
* Functionally illiterate: This describes someone who can read and write at a basic level, but struggles with more complex tasks like reading a newspaper or writing a letter.
It's important to remember that literacy is a complex concept, and there are many different levels of literacy. Someone who can read and write in one language may not be able to do so in another.