noun
parapet
PAR-uh-pit/ˈpærəpɪt/
A low protective wall along an edge or defensive position.
A low stone parapet protects visitors along the roof's edge.

Etymology
The elements suggest protection for the breast: a parapet was a breast-high defensive wall. The meaning extended to low walls at exposed edges that keep people from falling.
In context
the tanks opened fire fiercely on the Imperial Guards on the city wall Da da da Bang Bang Bang upon seeing this the Imperial Guards all crouched down under the parapet
More examples
- The bridge has sturdy parapets on both sides.
- Soldiers crouch behind the parapet for protection.
- Workers repair a crack in the balcony's parapet.
Forms
parapet · parapets
Similar words
- railing
- An edge barrier made of rails rather than a wall.
- rampart
- A large defensive bank or wall, not merely its protective edge.