A few points of note from Ziauddin Sardar’s book on the names for Mecca.
Mecca has had many names. It was known as al-Balad (the main city) and al-Qaryah (place large numbers of people congregate like water flowing into a reservoir). Mecca was also known as Baca as mentioned in Psalm 84:5-6
5 Blessed are those whose strength is in you,
in whose heart are the highways to Zion.[a]
6 As they go through the Valley of Baca
they make it a place of springs;
the early rain also covers it with pools.
The Arabic form of Baca, Bakkah, can be translated as ‘lack of stream’. The valley indeed was a dry place with no vegetation.