gate, gate bars, gatekeeper, gateposts, gateway

Definition:

The term “gate” refers to an access point in a fence, wall, or other kind of barrier that surrounds a house, property, city, etc.

A city gate could be opened to allow people, animals, and cargo to travel in and out of the city.
To protect the city, its walls and gates were thick and strong. Gates were closed and locked with a metal or wooden bar to prevent enemy soldiers from entering the city.
A “bar” for a gate refers to a wood or metal bar that can be moved into place so that the doors of the gate cannot be opened from the outside.
In Bible times, a city gate was often the social center for that town or city. It was a place where news of current events was exchanged between people, where business transactions occurred, and where civil judgments were made.

Depending on the context, other ways to translate “gate” could be “door” or “wall opening” or “barrier” or “entranceway.”
The phrase “bars of the gate” could be translated as “gate bolts” or “wooden beams to lock the gate” or “metal locking rods of the gate.”