The letter "ه" is the Arabic letter known as "hāʾ." It is the sixth letter in the Arabic alphabet and has a distinct sound similar to the English "h." In Arabic script, it can appear in different forms depending on its position in a word: isolated, initial, medial, or final. In terms of pronunciation, "ه" is a voiceless glottal fricative, produced by expelling air through the vocal cords without vibrating them. This letter is commonly used in many Arabic words, including names and everyday vocabulary, making it an essential part of the language.