Ibn Jinnī (d. 392/1002) defines grammar (naḥw) as follows: “It is to follow the way the Arabs speak… so that the non-Arabs might have access to the Arabs' faṣāḥa” (Xaṣāʾiṣ I, 34). More than a thousand years later, written Arabic is still called al-luġa al-fuṣḥā. This shows how the notion of faṣāḥa is an essential component of Arab language thinking.
The root f-ṣ-ḥ is ve…