glare (n.)youdaoicibaDictYouDict[glare 词源字典]
c. 1400, "bright light, dazzling glitter," from glare (v.); especially in reference to light reflected off some surface (17c.). From 1660s in sense of "fierce look." Old English glær (n.) meant "amber."[glare etymology, glare origin, 英语词源]