Joining Group - Teth

Teth is a joining group that defines how the Arabic letter beh, specifically the variant shaped like a “teth” (ؼ), connects to adjacent characters in cursive scripts like Arabic and Syriac. It determines the initial, medial, final, and isolated forms of this letter, ensuring that it links properly to the preceding and following letters according to the rules of Arabic script shaping. In practice, Teth behaves like other right-joining groups, meaning it only connects to the letter on its left, while the right side remains open unless paired with a preceding character that joins backward. This group is essential for text rendering, as it preserves the legible and connected flow of written words when transforming logical text into visual glyphs.