In terms of armor or regarding armor-related matters; concerning protective equipment or defenses.
Formed from armor plus the -wise suffix (meaning 'in the direction of' or 'with respect to'). This construction allows modification of statements to specify they relate to armor specifically.
The -wise suffix is sneaky powerful—you can add it to almost any noun (weather-wise, grammar-wise) to instantly create an adverb that means 'regarding that specific thing.'
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