greave (n.)youdaoicibaDictYouDict[greave 词源字典]
"metal armor to protect the front of the leg below the knee," c. 1300, from Old French greve "shin, armor for the leg" (12c.), of unknown origin. [Klein suggests it ultimately is from Egyptian Arabic gaurab "stocking, apparel for the leg."][greave etymology, greave origin, 英语词源]