A person who makes or designs armor, or someone who arms weapons and soldiers.
From Old French 'armeur,' derived from 'armer' (to arm), which comes from Latin 'armare' meaning 'to furnish with weapons.' The suffix '-er' indicates an agent noun—someone who performs the action.
Medieval armers were highly skilled craftspeople; a master armer's reputation could make or break a knight's chances in battle, since poorly-fitted armor could actually restrict movement and cause injury rather than protect.
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