The letter "Ghayn" (غ) is the 18th letter of the Arabic alphabet. It is a voiced pharyngeal fricative, which means it is produced by constricting the throat while voicing. "Ghayn" has a unique sound that does not have a direct equivalent in English, making it an important aspect of Arabic pronunciation. In Arabic script, "Ghayn" is written as غ and can take different forms depending on its position in a word. It is commonly found in various Arabic words and is essential for proper spelling and meaning. Understanding "Ghayn" is crucial for anyone learning the Arabic language.