The letter "د" is the fourth letter of the Arabic alphabet. It is pronounced as "dal" and represents a voiced dental stop sound, similar to the English "d." In Arabic script, "د" is written in a simple form and does not connect to the following letter when it appears at the beginning of a word. In terms of numerical value, "د" corresponds to the number 4 in the Arabic numeral system. It is commonly used in various Arabic words and names, contributing to the rich linguistic structure of the language. The letter is also found in related scripts, such as Persian and Urdu.