The margin draws a crucial distinction: hamzah belongs to point one, whereas madd alif belongs to the cavity. Consonantal wāw is labial and consonantal yāʾ is mid-tongue; in their madd conditions both are treated as cavity sounds.
Do not classify the point merely by the printed letter. Check whether the madd conditions hold. The book cites Ibn al-Jazarī's verse to describe the airy extension of the madd sounds.
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Hamzah, alif, wāw and yāʾ
Makhārij al-Ḥurūf — The Fifteen Articulation Points
The margin draws a crucial distinction: hamzah belongs to point one, whereas madd alif belongs to the cavity. Consonantal wāw is labial and consonantal yāʾ is mid-tongue; in their madd conditions both are treated as cavity sounds.
Do not classify the point merely by the printed letter. Check whether the madd conditions hold. The book cites Ibn al-Jazarī's verse to describe the airy extension of the madd sounds.