'armour' originates from Old French, specifically the word 'armure', where 'arm-' (from Latin 'arma') meant 'arms, weapons' and the suffix implied equipment or arrangement.

'armour' changed from Old French 'armure' and Middle English forms like 'armour'/'armur' and eventually became the modern English word 'armour'.

Initially it referred broadly to 'equipment or arms' and later narrowed to mean protective covering or plating used to defend a person or object.