Ghayn is the 18th letter of the Arabic alphabet. It is pronounced as a voiced pharyngeal fricative, which means it is produced by constricting the throat while vibrating the vocal cords. In Arabic script, it is written as غ and has a unique sound that does not have a direct equivalent in English. In terms of its numerical value, Ghayn represents the number 1000 in the Arabic numeral system. It is commonly used in various Arabic words and names, contributing to the rich phonetic diversity of the language. Understanding Ghayn is essential for anyone learning Arabic, as it appears frequently in both spoken and written forms.