Treated with or darkened by charcoal; colored black or dark gray as if marked with charcoal; or resembling charcoal in appearance.
From charcoal plus the past participle suffix -ed, describing something that has been affected by or treated with charcoal.
Artists and makeup designers love 'charcoaled eyes' because charcoal was humanity's first dark pigment—we used burned wood thousands of years before inventing modern makeup.
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