blazing (adj.)youdaoicibaDictYouDict[blazing 词源字典]
late 14c., "shining," also "vehement," present participle adjective from blaze (v.1). As a mild or euphemistic epithet, attested from 1888 (no doubt connected with the blazes in colloquial sense of "Hell").[blazing etymology, blazing origin, 英语词源]