degrade (v.)youdaoicibaDictYouDict[degrade 词源字典]
late 14c., from Old French degrader (12c.) "degrade, deprive (of office, rank, etc.)," from des- "down" (see dis-) + Latin gradus "step" (see grade (n.)). Related: Degraded; degrading.[degrade etymology, degrade origin, 英语词源]