This is Hebrew (and Arabic, perhaps) for “mound” or “hill” or “hill city.” It can also be spelled “Tell.”
The most well-known one is “Tel Aviv” which literally translates as “Spring Hill.”
It’s often used in archaeology to refer to ruins on a hill.
Why I Looked It Up
In a book about Israel:
Located just north of the Sea of Galilee, Hatzor is the biggest tel in the country and was one of the largest cities in the ancient world.
Hatzor is a bunch of ruins. Wikipedia calls it:
an archaeological tell at the site of ancient Hazor
I’m not sure about the “biggest tel in the country” line from above. It may have been at one time? It might refer to the archaeological ruins left there. Currently, Hatzor is a kibbutz with 700 people.