What is 'a' when translated from English to Italian?

Answer 1

If you mean an article in Italian, like a book, a chair:

It depends on the word you are saying after it:

Feminine - una

Masculine - un
"A" can be said in four different ways depending on the noun you want to use. if its masculine that starts with s + consonant or a z, then you would use "uno" if its masculine and it starts with a vowel, you would use "un'" (with apostrophe) if its femanine that starts with a vowel, you would use "un'" (with apostrophe) if its femanine that starts with any consonant, you would use "una"