To equip something with armor or a protective coating or hardening.
To provide something with an analogous form of protection.
A protective layer over a body, vehicle, or other object intended to deflect or diffuse damaging forces.
Metal plate, protecting a ship, military vehicle, or aircraft.
A tank, or other heavy mobile assault vehicle.
A military formation consisting primarily of tanks or other armoured fighting vehicles, collectively.
A natural form of this kind of protection on an animal's body.
The naturally occurring surface of pebbles, rocks or boulders that line the bed of a waterway or beach and provide protection against erosion.
A promise to pay a sum of money in the event that another person fails to fulfill an obligation.
One who undertakes to pay money or perform other acts in the event that his principal fails therein.
A substitute; a hostage.
Evidence; confirmation; warrant.
Certainty.
That which makes sure; that which confirms; ground of confidence or security.