Are yams and sweet potatoes the same?
mid-14c. (c.1200 as a surname), mid-14c., "intelligence; discretion, foresight; wisdom to see what is suitable or profitable;" also one of the four cardinal virtues, "wisdom to see what is virtuous;" from Old French prudence (13c.) and directly from Latin prudentia "a foreseeing, foresight, sagacity, practical judgment," contraction of providentia "foresight" (see providence). Secondary sense of "wisdom" (late 14c.) is preserved in jurisprudence.