The letter "ز" is the 12th letter of the Arabic alphabet. It is pronounced as "z" in English and is used in various Arabic words. The shape of "ز" is unique, with a single dot placed above it, distinguishing it from other letters. In Arabic script, "ز" can connect to letters that come before it but does not connect to letters that follow it. This characteristic affects how words are written and pronounced. The letter is also found in many languages that use the Arabic script, such as Persian and Urdu.