Why will Hashem return it to its grandeur?
Radak: Hashem destroyed it, and He will return it, to make known that it was from Hashem. The Navi prophesized about its demise and return, in the name of Hashem, before it was destroyed.
What is "l'Esnenah"?
Rashi: To its former status and wealth via trade. A derogatory expression [of a harlot's hire] is used.
Malbim: In the days of Koresh, Tzor lifted its head and was the trade of the nations. It took Esnan (wages) again from everyone who came to it for business.
What is the meaning of "v'Zansah"?
Rashi: It will supply merchandise (Radak, citing Targum Yonasan - to all kingdoms on the land). A derogatory expression [of Zenus] is used.
Radak: It will do business.
