The letter "ت" is the Arabic letter that represents the sound "t." It is the third letter in the Arabic alphabet and is pronounced similarly to the English "t" in "top." In Arabic script, "ت" has different forms depending on its position in a word: it can appear isolated, at the beginning, in the middle, or at the end. In terms of numerical value, "ت" corresponds to the number 400 in the Arabic abjad system. This letter is commonly used in many Arabic words, including تفاح (apple) and كتاب (book). Understanding "ت" is essential for reading and writing in Arabic.