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c.1200, "a whip, lash," from Anglo-French escorge, back-formation from Old French escorgier "to whip," from Vulgar Latin *excorrigiare, from Latin ex- "out, off" (see ex-) + corrigia "thong, shoelace," in this case "whip," probably from a Gaulish word related to Old Irish cuimrech "fetter," from PIE root *reig- "to bind" (see rig (v.)). Figurative use from late 14c. Scourge of God, title given by later generations to Attila the Hun (406-453 C.E.), is attested from late 14c., from Latin flagellum Dei.
c.1300, "to whip," from Old French escorgier and from scourge (n.). Figurative meaning "to afflict" (often for the sake of punishment or purification) is from late 14c. Related: Scourged; scourging.