Steel, especially in heraldry or archaic use; a steely or sword-like quality.
From French 'acier,' derived from Latin 'acies' (edge, battle line). The word traveled from Latin through Old French into English, where it remained largely in heraldic and poetic contexts.
In medieval heraldry, 'acier' represented strength and readiness for battle—it's why steel gray became the color of nobility and authority, appearing on countless family crests!
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