What is the function of wāw in wa-l-ʿaṣr?

Supplementary Practice 19: Comparative Rhetorical Analysis of Sūrat al-ʿAṣr and al-Takāthur

• An oath particle governing the genitive al-ʿaṣr
• A conjunction joining two responses to the oath
• A circumstantial wāw attaching a hidden clause
• An initial wāw negating a preceding assertion