In this Persian / Farsi reading and writing lesson, we learn the letter ض. This letter has the same base as ص but has one dot above. The letter is named 'zād' and is pronounced 'zé'. It is one of several letters that makes the 'zé' sound. Just as we said we ص, to know when to use this particular letter rather than others making the same 'zé' sound is merely a matter of memorization. In the lesson, we go over the lesson and learn several words that make use of it.