Joining Group - Sadhe

Sadhe is a joining group that defines how the Arabic letter seen with a diacritical mark, specifically the character for the sound “ṣ” as in the word “Sadhe” itself, connects to adjacent letters in cursive script. It belongs to the category of two-sided joiners, meaning it can link to both the preceding and following characters, forming continuous word shapes when used in scripts like Arabic or Persian. Unlike some joining groups that force a break, Sadhe permits full connectivity, but its visual form includes a distinctive upward hook or tail that can affect the ligature patterns with following letters. This behavior is essential for rendering words accurately, ensuring that the character does not cause an unintended gap that would alter the word’s visual integrity.