«الفاء للتعقيب مع الوصل»
Faa signifies succession with close connection.
The later element follows the earlier in a linked sequence; a completely independent postponement is not its basic sense. In “دخل زيد فعمرو,” Amr's entry is presented as following Zayd's entry in a connected order.
Unlike waaw, which merely combines events without inherently fixing their sequence, faa adds succession and close linkage. That additional meaning may change the structure of a legal condition or contractual statement.