noun / verb
armor
AR-mer/ˈɑrmər/
A protective covering that resists attack or injury.
The museum displays steel armor once worn by a mounted soldier.

Etymology
Armatura referred broadly to arms and equipment; English armor focused on defensive covering. That protective meaning later extended from covering combatants to shielding military machinery.
In context
you can even go back to knights in shining armor for early concepts of personal protective equipment
More examples
- Thick armor protects the vehicle's occupants.
- The beetle's shell acts as natural armor.
- Workers armored the cab with reinforced panels.
Forms
armor · armors · armored · armoring
Similar words
- shield
- A separate defensive barrier rather than a surrounding covering.
- protection
- A broad safeguard that need not be a physical layer.