shield
Definitions
A broad piece of metal or wood carried by hand as a protection against blows or missiles.
A person or thing that protects or screens someone or something from danger, risk, or unpleasant experience.
A protective plate or screen used to prevent injury or damage from heat, radiation, or mechanical impact.
Examples
The knight raised his shield to deflect the incoming arrows.
Sunscreen acts as a shield to protect your skin from harmful UV rays.
The thick walls of the bunker served as a shield against the explosion.