armor

armor (US) noun
or British armour /ˈɑɚmɚ/
armor (US)
noun
or British armour /ˈɑɚmɚ/
Britannica Dictionary definition of ARMOR
[noncount]
1 
: special clothing that people wear to protect their bodies from weapons
◊ Armor commonly refers to the heavy metal suits that men wore long ago when they fought in battles.
— see also knight in shining armor at 1knight
◊ A chink/crack in someone's or something's armor is a weakness that might cause someone or something to fail or to be defeated.
2 
a  : a hard covering that protects something (such as a vehicle or an animal)
— often used before another noun
b  : soldiers and vehicles (such as tanks) that are protected with armor